Finding the Fourth Proportional to 10,815.25, 14,911.52 and 9,025.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.25 : 14,911.52 = 9,025.31 : x
2. Step 2: Convert to fraction form
   10,815.25/14,911.52 = 9,025.31/x
3. Step 3: Cross multiply
   10,815.25x = 14,911.52 × 9,025.31
4. Step 4: Simplify right side
   10,815.25x = 134,581,075.86
5. Step 5: Solve for x
   x = 134,581,075.86/10,815.25
6. Step 6: Final answer
   x = 12,443.64