Finding the Fourth Proportional to 78,498.92, 108,327.49 and 42,688.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,498.92 : 108,327.49 = 42,688.17 : x
2. Step 2: Convert to fraction form
   78,498.92/108,327.49 = 42,688.17/x
3. Step 3: Cross multiply
   78,498.92x = 108,327.49 × 42,688.17
4. Step 4: Simplify right side
   78,498.92x = 4,624,302,202.07
5. Step 5: Solve for x
   x = 4,624,302,202.07/78,498.92
6. Step 6: Final answer
   x = 58,909.12