Finding the Fourth Proportional to 12,724.71, 17,555.31 and 9,375.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.71 : 17,555.31 = 9,375.53 : x
2. Step 2: Convert to fraction form
   12,724.71/17,555.31 = 9,375.53/x
3. Step 3: Cross multiply
   12,724.71x = 17,555.31 × 9,375.53
4. Step 4: Simplify right side
   12,724.71x = 164,590,247.79
5. Step 5: Solve for x
   x = 164,590,247.79/12,724.71
6. Step 6: Final answer
   x = 12,934.70