Finding the Fourth Proportional to 8,156.48, 12,230.52 and 5,815.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.48 : 12,230.52 = 5,815.28 : x
2. Step 2: Convert to fraction form
   8,156.48/12,230.52 = 5,815.28/x
3. Step 3: Cross multiply
   8,156.48x = 12,230.52 × 5,815.28
4. Step 4: Simplify right side
   8,156.48x = 71,123,898.35
5. Step 5: Solve for x
   x = 71,123,898.35/8,156.48
6. Step 6: Final answer
   x = 8,719.93