Finding the Fourth Proportional to 78,151.83, 116,892.84 and 72,479.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,151.83 : 116,892.84 = 72,479.31 : x
2. Step 2: Convert to fraction form
   78,151.83/116,892.84 = 72,479.31/x
3. Step 3: Cross multiply
   78,151.83x = 116,892.84 × 72,479.31
4. Step 4: Simplify right side
   78,151.83x = 8,472,312,387.14
5. Step 5: Solve for x
   x = 8,472,312,387.14/78,151.83
6. Step 6: Final answer
   x = 108,408.37