Finding the Fourth Proportional to 78,710.28, 108,622.56 and 42,902.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,710.28 : 108,622.56 = 42,902.61 : x
2. Step 2: Convert to fraction form
   78,710.28/108,622.56 = 42,902.61/x
3. Step 3: Cross multiply
   78,710.28x = 108,622.56 × 42,902.61
4. Step 4: Simplify right side
   78,710.28x = 4,660,191,328.88
5. Step 5: Solve for x
   x = 4,660,191,328.88/78,710.28
6. Step 6: Final answer
   x = 59,206.90