Finding the Fourth Proportional to 17,577.41, 24,256.77 and 9,920.17

Step by Step Solution

1. Step 1: Write the proportion equation
   17,577.41 : 24,256.77 = 9,920.17 : x
2. Step 2: Convert to fraction form
   17,577.41/24,256.77 = 9,920.17/x
3. Step 3: Cross multiply
   17,577.41x = 24,256.77 × 9,920.17
4. Step 4: Simplify right side
   17,577.41x = 240,631,275.17
5. Step 5: Solve for x
   x = 240,631,275.17/17,577.41
6. Step 6: Final answer
   x = 13,689.81