Finding the Fourth Proportional to 78,353.76, 108,128.24 and 42,543.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,353.76 : 108,128.24 = 42,543.76 : x
2. Step 2: Convert to fraction form
   78,353.76/108,128.24 = 42,543.76/x
3. Step 3: Cross multiply
   78,353.76x = 108,128.24 × 42,543.76
4. Step 4: Simplify right side
   78,353.76x = 4,600,181,891.78
5. Step 5: Solve for x
   x = 4,600,181,891.78/78,353.76
6. Step 6: Final answer
   x = 58,710.42