Finding the Fourth Proportional to 31,060.24, 42,857.43 and 18,317.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,060.24 : 42,857.43 = 18,317.42 : x
2. Step 2: Convert to fraction form
   31,060.24/42,857.43 = 18,317.42/x
3. Step 3: Cross multiply
   31,060.24x = 42,857.43 × 18,317.42
4. Step 4: Simplify right side
   31,060.24x = 785,037,545.43
5. Step 5: Solve for x
   x = 785,037,545.43/31,060.24
6. Step 6: Final answer
   x = 25,274.68