Finding the Fourth Proportional to 10,390.30, 14,338.90 and 5,674.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.30 : 14,338.90 = 5,674.88 : x
2. Step 2: Convert to fraction form
   10,390.30/14,338.90 = 5,674.88/x
3. Step 3: Cross multiply
   10,390.30x = 14,338.90 × 5,674.88
4. Step 4: Simplify right side
   10,390.30x = 81,371,536.83
5. Step 5: Solve for x
   x = 81,371,536.83/10,390.30
6. Step 6: Final answer
   x = 7,831.49