Finding the Fourth Proportional to 99,732,619,520.80, 149,748,207,231.69 and 86,328,475,945.86

Step by Step Solution

1. Step 1: Write the proportion equation
   99,732,619,520.80 : 149,748,207,231.69 = 86,328,475,945.86 : x
2. Step 2: Convert to fraction form
   99,732,619,520.80/149,748,207,231.69 = 86,328,475,945.86/x
3. Step 3: Cross multiply
   99,732,619,520.80x = 149,748,207,231.69 × 86,328,475,945.86
4. Step 4: Simplify right side
   99,732,619,520.80x = 12,927,534,505,936,010,870,784
5. Step 5: Solve for x
   x = 12,927,534,505,936,010,870,784/99,732,619,520.80
6. Step 6: Final answer
   x = 129,621,928,793.72