Finding the Fourth Proportional to 140,651.12, 210,976.05 and 57,545.12

Step by Step Solution

1. Step 1: Write the proportion equation
   140,651.12 : 210,976.05 = 57,545.12 : x
2. Step 2: Convert to fraction form
   140,651.12/210,976.05 = 57,545.12/x
3. Step 3: Cross multiply
   140,651.12x = 210,976.05 × 57,545.12
4. Step 4: Simplify right side
   140,651.12x = 12,140,642,114.38
5. Step 5: Solve for x
   x = 12,140,642,114.38/140,651.12
6. Step 6: Final answer
   x = 86,317.42