Finding the Fourth Proportional to 2,061.72, 2,845.20 and 1,130.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.72 : 2,845.20 = 1,130.28 : x
2. Step 2: Convert to fraction form
   2,061.72/2,845.20 = 1,130.28/x
3. Step 3: Cross multiply
   2,061.72x = 2,845.20 × 1,130.28
4. Step 4: Simplify right side
   2,061.72x = 3,215,872.66
5. Step 5: Solve for x
   x = 3,215,872.66/2,061.72
6. Step 6: Final answer
   x = 1,559.80