Finding the Fourth Proportional to 17,690.87, 24,404.81 and 10,978.65

Step by Step Solution

1. Step 1: Write the proportion equation
   17,690.87 : 24,404.81 = 10,978.65 : x
2. Step 2: Convert to fraction form
   17,690.87/24,404.81 = 10,978.65/x
3. Step 3: Cross multiply
   17,690.87x = 24,404.81 × 10,978.65
4. Step 4: Simplify right side
   17,690.87x = 267,931,812.41
5. Step 5: Solve for x
   x = 267,931,812.41/17,690.87
6. Step 6: Final answer
   x = 15,145.20