Finding the Fourth Proportional to 78,354.55, 108,126.24 and 42,543.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,354.55 : 108,126.24 = 42,543.74 : x
2. Step 2: Convert to fraction form
   78,354.55/108,126.24 = 42,543.74/x
3. Step 3: Cross multiply
   78,354.55x = 108,126.24 × 42,543.74
4. Step 4: Simplify right side
   78,354.55x = 4,600,094,371.42
5. Step 5: Solve for x
   x = 4,600,094,371.42/78,354.55
6. Step 6: Final answer
   x = 58,708.71