Finding the Fourth Proportional to 1,061.57, 1,592.23 and 321.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.57 : 1,592.23 = 321.10 : x
2. Step 2: Convert to fraction form
   1,061.57/1,592.23 = 321.10/x
3. Step 3: Cross multiply
   1,061.57x = 1,592.23 × 321.10
4. Step 4: Simplify right side
   1,061.57x = 511,265.05
5. Step 5: Solve for x
   x = 511,265.05/1,061.57
6. Step 6: Final answer
   x = 481.61