Finding the Fourth Proportional to 10,426.16, 15,624.68 and 7,490.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,426.16 : 15,624.68 = 7,490.72 : x
2. Step 2: Convert to fraction form
   10,426.16/15,624.68 = 7,490.72/x
3. Step 3: Cross multiply
   10,426.16x = 15,624.68 × 7,490.72
4. Step 4: Simplify right side
   10,426.16x = 117,040,102.97
5. Step 5: Solve for x
   x = 117,040,102.97/10,426.16
6. Step 6: Final answer
   x = 11,225.62