Finding the Fourth Proportional to 10,288.10, 15,428.55 and 5,356.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,288.10 : 15,428.55 = 5,356.10 : x
2. Step 2: Convert to fraction form
   10,288.10/15,428.55 = 5,356.10/x
3. Step 3: Cross multiply
   10,288.10x = 15,428.55 × 5,356.10
4. Step 4: Simplify right side
   10,288.10x = 82,636,856.66
5. Step 5: Solve for x
   x = 82,636,856.66/10,288.10
6. Step 6: Final answer
   x = 8,032.28