Finding the Fourth Proportional to 9,285.32, 12,815.38 and 5,510.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,285.32 : 12,815.38 = 5,510.57 : x
2. Step 2: Convert to fraction form
   9,285.32/12,815.38 = 5,510.57/x
3. Step 3: Cross multiply
   9,285.32x = 12,815.38 × 5,510.57
4. Step 4: Simplify right side
   9,285.32x = 70,619,970.71
5. Step 5: Solve for x
   x = 70,619,970.71/9,285.32
6. Step 6: Final answer
   x = 7,605.55