Finding the Fourth Proportional to 22,488.26, 31,034.80 and 12,931.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,488.26 : 31,034.80 = 12,931.25 : x
2. Step 2: Convert to fraction form
   22,488.26/31,034.80 = 12,931.25/x
3. Step 3: Cross multiply
   22,488.26x = 31,034.80 × 12,931.25
4. Step 4: Simplify right side
   22,488.26x = 401,318,545.75
5. Step 5: Solve for x
   x = 401,318,545.75/22,488.26
6. Step 6: Final answer
   x = 17,845.69