Finding the Fourth Proportional to 78,165.61, 107,868.92 and 42,355.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,165.61 : 107,868.92 = 42,355.61 : x
2. Step 2: Convert to fraction form
   78,165.61/107,868.92 = 42,355.61/x
3. Step 3: Cross multiply
   78,165.61x = 107,868.92 × 42,355.61
4. Step 4: Simplify right side
   78,165.61x = 4,568,853,560.03
5. Step 5: Solve for x
   x = 4,568,853,560.03/78,165.61
6. Step 6: Final answer
   x = 58,450.94