Finding the Fourth Proportional to 10,288.06, 15,426.15 and 9,057.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,288.06 : 15,426.15 = 9,057.94 : x
2. Step 2: Convert to fraction form
   10,288.06/15,426.15 = 9,057.94/x
3. Step 3: Cross multiply
   10,288.06x = 15,426.15 × 9,057.94
4. Step 4: Simplify right side
   10,288.06x = 139,729,141.13
5. Step 5: Solve for x
   x = 139,729,141.13/10,288.06
6. Step 6: Final answer
   x = 13,581.68