Finding the Fourth Proportional to 162,385.96, 243,609.20 and 57,271.72

Step by Step Solution

1. Step 1: Write the proportion equation
   162,385.96 : 243,609.20 = 57,271.72 : x
2. Step 2: Convert to fraction form
   162,385.96/243,609.20 = 57,271.72/x
3. Step 3: Cross multiply
   162,385.96x = 243,609.20 × 57,271.72
4. Step 4: Simplify right side
   162,385.96x = 13,951,917,891.82
5. Step 5: Solve for x
   x = 13,951,917,891.82/162,385.96
6. Step 6: Final answer
   x = 85,918.25