Finding the Fourth Proportional to 10,390.50, 14,338.89 and 5,674.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.50 : 14,338.89 = 5,674.79 : x
2. Step 2: Convert to fraction form
   10,390.50/14,338.89 = 5,674.79/x
3. Step 3: Cross multiply
   10,390.50x = 14,338.89 × 5,674.79
4. Step 4: Simplify right side
   10,390.50x = 81,370,225.43
5. Step 5: Solve for x
   x = 81,370,225.43/10,390.50
6. Step 6: Final answer
   x = 7,831.21