Finding the Fourth Proportional to 1,061.28, 1,584.87 and 1,049.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.28 : 1,584.87 = 1,049.85 : x
2. Step 2: Convert to fraction form
   1,061.28/1,584.87 = 1,049.85/x
3. Step 3: Cross multiply
   1,061.28x = 1,584.87 × 1,049.85
4. Step 4: Simplify right side
   1,061.28x = 1,663,875.77
5. Step 5: Solve for x
   x = 1,663,875.77/1,061.28
6. Step 6: Final answer
   x = 1,567.80