Finding the Fourth Proportional to 78,657.28, 108,546.82 and 42,847.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,657.28 : 108,546.82 = 42,847.18 : x
2. Step 2: Convert to fraction form
   78,657.28/108,546.82 = 42,847.18/x
3. Step 3: Cross multiply
   78,657.28x = 108,546.82 × 42,847.18
4. Step 4: Simplify right side
   78,657.28x = 4,650,924,756.48
5. Step 5: Solve for x
   x = 4,650,924,756.48/78,657.28
6. Step 6: Final answer
   x = 59,128.98