Finding the Fourth Proportional to 9,557.76, 13,152.96 and 9,287.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,557.76 : 13,152.96 = 9,287.04 : x
2. Step 2: Convert to fraction form
   9,557.76/13,152.96 = 9,287.04/x
3. Step 3: Cross multiply
   9,557.76x = 13,152.96 × 9,287.04
4. Step 4: Simplify right side
   9,557.76x = 122,152,065.64
5. Step 5: Solve for x
   x = 122,152,065.64/9,557.76
6. Step 6: Final answer
   x = 12,780.41