Finding the Fourth Proportional to 146,016.12, 219,025.92 and 57,311.40

Step by Step Solution

1. Step 1: Write the proportion equation
   146,016.12 : 219,025.92 = 57,311.40 : x
2. Step 2: Convert to fraction form
   146,016.12/219,025.92 = 57,311.40/x
3. Step 3: Cross multiply
   146,016.12x = 219,025.92 × 57,311.40
4. Step 4: Simplify right side
   146,016.12x = 12,552,682,111.49
5. Step 5: Solve for x
   x = 12,552,682,111.49/146,016.12
6. Step 6: Final answer
   x = 85,967.78