Finding the Fourth Proportional to 1,061.10, 1,589.91 and 1,020.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.10 : 1,589.91 = 1,020.60 : x
2. Step 2: Convert to fraction form
   1,061.10/1,589.91 = 1,020.60/x
3. Step 3: Cross multiply
   1,061.10x = 1,589.91 × 1,020.60
4. Step 4: Simplify right side
   1,061.10x = 1,622,662.15
5. Step 5: Solve for x
   x = 1,622,662.15/1,061.10
6. Step 6: Final answer
   x = 1,529.23