Finding the Fourth Proportional to 142,144.27, 213,031.49 and 57,806.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,144.27 : 213,031.49 = 57,806.12 : x
2. Step 2: Convert to fraction form
   142,144.27/213,031.49 = 57,806.12/x
3. Step 3: Cross multiply
   142,144.27x = 213,031.49 × 57,806.12
4. Step 4: Simplify right side
   142,144.27x = 12,314,524,118.27
5. Step 5: Solve for x
   x = 12,314,524,118.27/142,144.27
6. Step 6: Final answer
   x = 86,633.98