Finding the Fourth Proportional to 142,145.27, 213,032.98 and 57,807.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,145.27 : 213,032.98 = 57,807.12 : x
2. Step 2: Convert to fraction form
   142,145.27/213,032.98 = 57,807.12/x
3. Step 3: Cross multiply
   142,145.27x = 213,032.98 × 57,807.12
4. Step 4: Simplify right side
   142,145.27x = 12,314,823,038.82
5. Step 5: Solve for x
   x = 12,314,823,038.82/142,145.27
6. Step 6: Final answer
   x = 86,635.48