Finding the Fourth Proportional to 2,020.10, 3,029.49 and 787.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.10 : 3,029.49 = 787.20 : x
2. Step 2: Convert to fraction form
   2,020.10/3,029.49 = 787.20/x
3. Step 3: Cross multiply
   2,020.10x = 3,029.49 × 787.20
4. Step 4: Simplify right side
   2,020.10x = 2,384,814.53
5. Step 5: Solve for x
   x = 2,384,814.53/2,020.10
6. Step 6: Final answer
   x = 1,180.55