Finding the Fourth Proportional to 1,061.01, 1,590.59 and 411.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.01 : 1,590.59 = 411.30 : x
2. Step 2: Convert to fraction form
   1,061.01/1,590.59 = 411.30/x
3. Step 3: Cross multiply
   1,061.01x = 1,590.59 × 411.30
4. Step 4: Simplify right side
   1,061.01x = 654,207.61
5. Step 5: Solve for x
   x = 654,207.61/1,061.01
6. Step 6: Final answer
   x = 616.59