Finding the Fourth Proportional to 140,871.32, 211,313.46 and 57,707

Step by Step Solution

1. Step 1: Write the proportion equation
   140,871.32 : 211,313.46 = 57,707 : x
2. Step 2: Convert to fraction form
   140,871.32/211,313.46 = 57,707/x
3. Step 3: Cross multiply
   140,871.32x = 211,313.46 × 57,707
4. Step 4: Simplify right side
   140,871.32x = 12,194,265,836.22
5. Step 5: Solve for x
   x = 12,194,265,836.22/140,871.32
6. Step 6: Final answer
   x = 86,563.15