Finding the Fourth Proportional to 1,061.48, 1,581.46 and 1,009.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.48 : 1,581.46 = 1,009.20 : x
2. Step 2: Convert to fraction form
   1,061.48/1,581.46 = 1,009.20/x
3. Step 3: Cross multiply
   1,061.48x = 1,581.46 × 1,009.20
4. Step 4: Simplify right side
   1,061.48x = 1,596,014.07
5. Step 5: Solve for x
   x = 1,596,014.07/1,061.48
6. Step 6: Final answer
   x = 1,503.57