Finding the Fourth Proportional to 78,123.50, 107,810.85 and 42,313.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,123.50 : 107,810.85 = 42,313.61 : x
2. Step 2: Convert to fraction form
   78,123.50/107,810.85 = 42,313.61/x
3. Step 3: Cross multiply
   78,123.50x = 107,810.85 × 42,313.61
4. Step 4: Simplify right side
   78,123.50x = 4,561,866,260.67
5. Step 5: Solve for x
   x = 4,561,866,260.67/78,123.50
6. Step 6: Final answer
   x = 58,393.01