Finding the Fourth Proportional to 78,302.15, 108,057.25 and 42,492.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,302.15 : 108,057.25 = 42,492.15 : x
2. Step 2: Convert to fraction form
   78,302.15/108,057.25 = 42,492.15/x
3. Step 3: Cross multiply
   78,302.15x = 108,057.25 × 42,492.15
4. Step 4: Simplify right side
   78,302.15x = 4,591,584,875.59
5. Step 5: Solve for x
   x = 4,591,584,875.59/78,302.15
6. Step 6: Final answer
   x = 58,639.32