Finding the Fourth Proportional to 1,061.61, 1,592.00 and 321.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.61 : 1,592.00 = 321.06 : x
2. Step 2: Convert to fraction form
   1,061.61/1,592.00 = 321.06/x
3. Step 3: Cross multiply
   1,061.61x = 1,592.00 × 321.06
4. Step 4: Simplify right side
   1,061.61x = 511,134.89
5. Step 5: Solve for x
   x = 511,134.89/1,061.61
6. Step 6: Final answer
   x = 481.47