Finding the Fourth Proportional to 72,256,081.29, 99,713,490.77 and 39,216,330.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,256,081.29 : 99,713,490.77 = 39,216,330.78 : x
2. Step 2: Convert to fraction form
   72,256,081.29/99,713,490.77 = 39,216,330.78/x
3. Step 3: Cross multiply
   72,256,081.29x = 99,713,490.77 × 39,216,330.78
4. Step 4: Simplify right side
   72,256,081.29x = 3,910,397,237,264,797
5. Step 5: Solve for x
   x = 3,910,397,237,264,797/72,256,081.29
6. Step 6: Final answer
   x = 54,118,589.99