Finding the Fourth Proportional to 2,020.72, 3,031.20 and 560.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.72 : 3,031.20 = 560.08 : x
2. Step 2: Convert to fraction form
   2,020.72/3,031.20 = 560.08/x
3. Step 3: Cross multiply
   2,020.72x = 3,031.20 × 560.08
4. Step 4: Simplify right side
   2,020.72x = 1,697,714.50
5. Step 5: Solve for x
   x = 1,697,714.50/2,020.72
6. Step 6: Final answer
   x = 840.15