Finding the Fourth Proportional to 139,462,632.80, 209,129,305.27 and 52,000,666.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,462,632.80 : 209,129,305.27 = 52,000,666.18 : x
2. Step 2: Convert to fraction form
   139,462,632.80/209,129,305.27 = 52,000,666.18/x
3. Step 3: Cross multiply
   139,462,632.80x = 209,129,305.27 × 52,000,666.18
4. Step 4: Simplify right side
   139,462,632.80x = 10,874,863,190,494,934
5. Step 5: Solve for x
   x = 10,874,863,190,494,934/139,462,632.80
6. Step 6: Final answer
   x = 77,976,895.84