Finding the Fourth Proportional to 147,789.15, 221,688.51 and 57,828.32

Step by Step Solution

1. Step 1: Write the proportion equation
   147,789.15 : 221,688.51 = 57,828.32 : x
2. Step 2: Convert to fraction form
   147,789.15/221,688.51 = 57,828.32/x
3. Step 3: Cross multiply
   147,789.15x = 221,688.51 × 57,828.32
4. Step 4: Simplify right side
   147,789.15x = 12,819,874,096.60
5. Step 5: Solve for x
   x = 12,819,874,096.60/147,789.15
6. Step 6: Final answer
   x = 86,744.36