Finding the Fourth Proportional to 17,172.21, 23,695.17 and 9,618.87

Step by Step Solution

1. Step 1: Write the proportion equation
   17,172.21 : 23,695.17 = 9,618.87 : x
2. Step 2: Convert to fraction form
   17,172.21/23,695.17 = 9,618.87/x
3. Step 3: Cross multiply
   17,172.21x = 23,695.17 × 9,618.87
4. Step 4: Simplify right side
   17,172.21x = 227,920,759.86
5. Step 5: Solve for x
   x = 227,920,759.86/17,172.21
6. Step 6: Final answer
   x = 13,272.65