Finding the Fourth Proportional to 9,640.38, 13,311.27 and 7,398.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,640.38 : 13,311.27 = 7,398.71 : x
2. Step 2: Convert to fraction form
   9,640.38/13,311.27 = 7,398.71/x
3. Step 3: Cross multiply
   9,640.38x = 13,311.27 × 7,398.71
4. Step 4: Simplify right side
   9,640.38x = 98,486,226.46
5. Step 5: Solve for x
   x = 98,486,226.46/9,640.38
6. Step 6: Final answer
   x = 10,216.01