Finding the Fourth Proportional to 78,502.56, 108,332.42 and 42,692.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,502.56 : 108,332.42 = 42,692.87 : x
2. Step 2: Convert to fraction form
   78,502.56/108,332.42 = 42,692.87/x
3. Step 3: Cross multiply
   78,502.56x = 108,332.42 × 42,692.87
4. Step 4: Simplify right side
   78,502.56x = 4,625,021,168.72
5. Step 5: Solve for x
   x = 4,625,021,168.72/78,502.56
6. Step 6: Final answer
   x = 58,915.55