Finding the Fourth Proportional to 17,870.98, 24,664.89 and 9,915.77

Step by Step Solution

1. Step 1: Write the proportion equation
   17,870.98 : 24,664.89 = 9,915.77 : x
2. Step 2: Convert to fraction form
   17,870.98/24,664.89 = 9,915.77/x
3. Step 3: Cross multiply
   17,870.98x = 24,664.89 × 9,915.77
4. Step 4: Simplify right side
   17,870.98x = 244,571,280.65
5. Step 5: Solve for x
   x = 244,571,280.65/17,870.98
6. Step 6: Final answer
   x = 13,685.39