Finding the Fourth Proportional to 52,558.76, 78,726.05 and 42,520.43

Step by Step Solution

1. Step 1: Write the proportion equation
   52,558.76 : 78,726.05 = 42,520.43 : x
2. Step 2: Convert to fraction form
   52,558.76/78,726.05 = 42,520.43/x
3. Step 3: Cross multiply
   52,558.76x = 78,726.05 × 42,520.43
4. Step 4: Simplify right side
   52,558.76x = 3,347,465,498.20
5. Step 5: Solve for x
   x = 3,347,465,498.20/52,558.76
6. Step 6: Final answer
   x = 63,689.96