Finding the Fourth Proportional to 78,402.87, 108,196.05 and 42,592.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,402.87 : 108,196.05 = 42,592.91 : x
2. Step 2: Convert to fraction form
   78,402.87/108,196.05 = 42,592.91/x
3. Step 3: Cross multiply
   78,402.87x = 108,196.05 × 42,592.91
4. Step 4: Simplify right side
   78,402.87x = 4,608,384,238.75
5. Step 5: Solve for x
   x = 4,608,384,238.75/78,402.87
6. Step 6: Final answer
   x = 58,778.26