Finding the Fourth Proportional to 9,787.68, 13,512.69 and 7,425.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,787.68 : 13,512.69 = 7,425.72 : x
2. Step 2: Convert to fraction form
   9,787.68/13,512.69 = 7,425.72/x
3. Step 3: Cross multiply
   9,787.68x = 13,512.69 × 7,425.72
4. Step 4: Simplify right side
   9,787.68x = 100,341,452.39
5. Step 5: Solve for x
   x = 100,341,452.39/9,787.68
6. Step 6: Final answer
   x = 10,251.81