Finding the Fourth Proportional to 128,747,796.52, 177,666,550.86 and 72,996,967.48

Step by Step Solution

1. Step 1: Write the proportion equation
   128,747,796.52 : 177,666,550.86 = 72,996,967.48 : x
2. Step 2: Convert to fraction form
   128,747,796.52/177,666,550.86 = 72,996,967.48/x
3. Step 3: Cross multiply
   128,747,796.52x = 177,666,550.86 × 72,996,967.48
4. Step 4: Simplify right side
   128,747,796.52x = 12,969,119,435,411,188
5. Step 5: Solve for x
   x = 12,969,119,435,411,188/128,747,796.52
6. Step 6: Final answer
   x = 100,732,748.72