Finding the Fourth Proportional to 147,847.31, 221,789.42 and 57,878.40

Step by Step Solution

1. Step 1: Write the proportion equation
   147,847.31 : 221,789.42 = 57,878.40 : x
2. Step 2: Convert to fraction form
   147,847.31/221,789.42 = 57,878.40/x
3. Step 3: Cross multiply
   147,847.31x = 221,789.42 × 57,878.40
4. Step 4: Simplify right side
   147,847.31x = 12,836,816,766.53
5. Step 5: Solve for x
   x = 12,836,816,766.53/147,847.31
6. Step 6: Final answer
   x = 86,824.82