Finding the Fourth Proportional to 78,715.28, 108,627 and 42,905.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,715.28 : 108,627 = 42,905.36 : x
2. Step 2: Convert to fraction form
   78,715.28/108,627 = 42,905.36/x
3. Step 3: Cross multiply
   78,715.28x = 108,627 × 42,905.36
4. Step 4: Simplify right side
   78,715.28x = 4,660,680,540.72
5. Step 5: Solve for x
   x = 4,660,680,540.72/78,715.28
6. Step 6: Final answer
   x = 59,209.35