Finding the Fourth Proportional to 72,509,912.11, 99,873,064.89 and 55,732,568.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,509,912.11 : 99,873,064.89 = 55,732,568.17 : x
2. Step 2: Convert to fraction form
   72,509,912.11/99,873,064.89 = 55,732,568.17/x
3. Step 3: Cross multiply
   72,509,912.11x = 99,873,064.89 × 55,732,568.17
4. Step 4: Simplify right side
   72,509,912.11x = 5,566,182,397,328,759
5. Step 5: Solve for x
   x = 5,566,182,397,328,759/72,509,912.11
6. Step 6: Final answer
   x = 76,764,434.48