Finding the Fourth Proportional to 1,061.30, 1,592.09 and 411.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.30 : 1,592.09 = 411.95 : x
2. Step 2: Convert to fraction form
   1,061.30/1,592.09 = 411.95/x
3. Step 3: Cross multiply
   1,061.30x = 1,592.09 × 411.95
4. Step 4: Simplify right side
   1,061.30x = 655,859.42
5. Step 5: Solve for x
   x = 655,859.42/1,061.30
6. Step 6: Final answer
   x = 617.98