Finding the Fourth Proportional to 10,423.10, 15,618.18 and 8,356.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,423.10 : 15,618.18 = 8,356.52 : x
2. Step 2: Convert to fraction form
   10,423.10/15,618.18 = 8,356.52/x
3. Step 3: Cross multiply
   10,423.10x = 15,618.18 × 8,356.52
4. Step 4: Simplify right side
   10,423.10x = 130,513,633.53
5. Step 5: Solve for x
   x = 130,513,633.53/10,423.10
6. Step 6: Final answer
   x = 12,521.58