Finding the Fourth Proportional to 2,017.72, 3,026.20 and 847.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.72 : 3,026.20 = 847.40 : x
2. Step 2: Convert to fraction form
   2,017.72/3,026.20 = 847.40/x
3. Step 3: Cross multiply
   2,017.72x = 3,026.20 × 847.40
4. Step 4: Simplify right side
   2,017.72x = 2,564,401.88
5. Step 5: Solve for x
   x = 2,564,401.88/2,017.72
6. Step 6: Final answer
   x = 1,270.94