Finding the Fourth Proportional to 11,724.30, 17,574.17 and 8,435.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,724.30 : 17,574.17 = 8,435.61 : x
2. Step 2: Convert to fraction form
   11,724.30/17,574.17 = 8,435.61/x
3. Step 3: Cross multiply
   11,724.30x = 17,574.17 × 8,435.61
4. Step 4: Simplify right side
   11,724.30x = 148,248,802.02
5. Step 5: Solve for x
   x = 148,248,802.02/11,724.30
6. Step 6: Final answer
   x = 12,644.58