Finding the Fourth Proportional to 17,478.79, 24,120.77 and 9,521.04

Step by Step Solution

1. Step 1: Write the proportion equation
   17,478.79 : 24,120.77 = 9,521.04 : x
2. Step 2: Convert to fraction form
   17,478.79/24,120.77 = 9,521.04/x
3. Step 3: Cross multiply
   17,478.79x = 24,120.77 × 9,521.04
4. Step 4: Simplify right side
   17,478.79x = 229,654,858.85
5. Step 5: Solve for x
   x = 229,654,858.85/17,478.79
6. Step 6: Final answer
   x = 13,139.06