Finding the Fourth Proportional to 1,061.55, 1,592.29 and 321.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.55 : 1,592.29 = 321.17 : x
2. Step 2: Convert to fraction form
   1,061.55/1,592.29 = 321.17/x
3. Step 3: Cross multiply
   1,061.55x = 1,592.29 × 321.17
4. Step 4: Simplify right side
   1,061.55x = 511,395.78
5. Step 5: Solve for x
   x = 511,395.78/1,061.55
6. Step 6: Final answer
   x = 481.74