Finding the Fourth Proportional to 10,359.30, 15,521.67 and 7,275.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,359.30 : 15,521.67 = 7,275.78 : x
2. Step 2: Convert to fraction form
   10,359.30/15,521.67 = 7,275.78/x
3. Step 3: Cross multiply
   10,359.30x = 15,521.67 × 7,275.78
4. Step 4: Simplify right side
   10,359.30x = 112,932,256.15
5. Step 5: Solve for x
   x = 112,932,256.15/10,359.30
6. Step 6: Final answer
   x = 10,901.53