Finding the Fourth Proportional to 10,404.90, 15,527.25 and 8,315.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,404.90 : 15,527.25 = 8,315.10 : x
2. Step 2: Convert to fraction form
   10,404.90/15,527.25 = 8,315.10/x
3. Step 3: Cross multiply
   10,404.90x = 15,527.25 × 8,315.10
4. Step 4: Simplify right side
   10,404.90x = 129,110,636.48
5. Step 5: Solve for x
   x = 129,110,636.48/10,404.90
6. Step 6: Final answer
   x = 12,408.64