Finding the Fourth Proportional to 22,560.42, 31,133.01 and 12,488.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,560.42 : 31,133.01 = 12,488.65 : x
2. Step 2: Convert to fraction form
   22,560.42/31,133.01 = 12,488.65/x
3. Step 3: Cross multiply
   22,560.42x = 31,133.01 × 12,488.65
4. Step 4: Simplify right side
   22,560.42x = 388,809,265.34
5. Step 5: Solve for x
   x = 388,809,265.34/22,560.42
6. Step 6: Final answer
   x = 17,234.13