Finding the Fourth Proportional to 10,502.69, 14,489.55 and 7,315.13

Step by Step Solution

1. Step 1: Write the proportion equation
   10,502.69 : 14,489.55 = 7,315.13 : x
2. Step 2: Convert to fraction form
   10,502.69/14,489.55 = 7,315.13/x
3. Step 3: Cross multiply
   10,502.69x = 14,489.55 × 7,315.13
4. Step 4: Simplify right side
   10,502.69x = 105,992,978.12
5. Step 5: Solve for x
   x = 105,992,978.12/10,502.69
6. Step 6: Final answer
   x = 10,091.99