Finding the Fourth Proportional to 9,787.68, 14,680.80 and 2,862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,787.68 : 14,680.80 = 2,862.72 : x
2. Step 2: Convert to fraction form
   9,787.68/14,680.80 = 2,862.72/x
3. Step 3: Cross multiply
   9,787.68x = 14,680.80 × 2,862.72
4. Step 4: Simplify right side
   9,787.68x = 42,027,019.78
5. Step 5: Solve for x
   x = 42,027,019.78/9,787.68
6. Step 6: Final answer
   x = 4,293.87