Finding the Fourth Proportional to 2,680.88, 4,017.72 and 947.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.88 : 4,017.72 = 947.84 : x
2. Step 2: Convert to fraction form
   2,680.88/4,017.72 = 947.84/x
3. Step 3: Cross multiply
   2,680.88x = 4,017.72 × 947.84
4. Step 4: Simplify right side
   2,680.88x = 3,808,155.72
5. Step 5: Solve for x
   x = 3,808,155.72/2,680.88
6. Step 6: Final answer
   x = 1,420.49