Finding the Fourth Proportional to 17,395.61, 23,999.36 and 12,869.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,395.61 : 23,999.36 = 12,869.10 : x
2. Step 2: Convert to fraction form
   17,395.61/23,999.36 = 12,869.10/x
3. Step 3: Cross multiply
   17,395.61x = 23,999.36 × 12,869.10
4. Step 4: Simplify right side
   17,395.61x = 308,850,099.43
5. Step 5: Solve for x
   x = 308,850,099.43/17,395.61
6. Step 6: Final answer
   x = 17,754.49