Finding the Fourth Proportional to 78,517.56, 108,353.30 and 42,706.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,517.56 : 108,353.30 = 42,706.80 : x
2. Step 2: Convert to fraction form
   78,517.56/108,353.30 = 42,706.80/x
3. Step 3: Cross multiply
   78,517.56x = 108,353.30 × 42,706.80
4. Step 4: Simplify right side
   78,517.56x = 4,627,422,712.44
5. Step 5: Solve for x
   x = 4,627,422,712.44/78,517.56
6. Step 6: Final answer
   x = 58,934.88