Finding the Fourth Proportional to 142,042.11, 213,144.57 and 57,786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,042.11 : 213,144.57 = 57,786.72 : x
2. Step 2: Convert to fraction form
   142,042.11/213,144.57 = 57,786.72/x
3. Step 3: Cross multiply
   142,042.11x = 213,144.57 × 57,786.72
4. Step 4: Simplify right side
   142,042.11x = 12,316,925,586.11
5. Step 5: Solve for x
   x = 12,316,925,586.11/142,042.11
6. Step 6: Final answer
   x = 86,713.20