Finding the Fourth Proportional to 22,545.17, 31,114.65 and 12,985.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,545.17 : 31,114.65 = 12,985.37 : x
2. Step 2: Convert to fraction form
   22,545.17/31,114.65 = 12,985.37/x
3. Step 3: Cross multiply
   22,545.17x = 31,114.65 × 12,985.37
4. Step 4: Simplify right side
   22,545.17x = 404,035,087.10
5. Step 5: Solve for x
   x = 404,035,087.10/22,545.17
6. Step 6: Final answer
   x = 17,921.14