Finding the Fourth Proportional to 142,506.96, 213,760.24 and 57,156.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,506.96 : 213,760.24 = 57,156.32 : x
2. Step 2: Convert to fraction form
   142,506.96/213,760.24 = 57,156.32/x
3. Step 3: Cross multiply
   142,506.96x = 213,760.24 × 57,156.32
4. Step 4: Simplify right side
   142,506.96x = 12,217,748,680.72
5. Step 5: Solve for x
   x = 12,217,748,680.72/142,506.96
6. Step 6: Final answer
   x = 85,734.40