Finding the Fourth Proportional to 12,521.65, 17,282.15 and 7,144.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,521.65 : 17,282.15 = 7,144.87 : x
2. Step 2: Convert to fraction form
   12,521.65/17,282.15 = 7,144.87/x
3. Step 3: Cross multiply
   12,521.65x = 17,282.15 × 7,144.87
4. Step 4: Simplify right side
   12,521.65x = 123,478,715.07
5. Step 5: Solve for x
   x = 123,478,715.07/12,521.65
6. Step 6: Final answer
   x = 9,861.22