Finding the Fourth Proportional to 78,515.96, 108,350.98 and 42,705.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,515.96 : 108,350.98 = 42,705.20 : x
2. Step 2: Convert to fraction form
   78,515.96/108,350.98 = 42,705.20/x
3. Step 3: Cross multiply
   78,515.96x = 108,350.98 × 42,705.20
4. Step 4: Simplify right side
   78,515.96x = 4,627,150,271.10
5. Step 5: Solve for x
   x = 4,627,150,271.10/78,515.96
6. Step 6: Final answer
   x = 58,932.61