Finding the Fourth Proportional to 1,061.91, 1,592.25 and 411.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.91 : 1,592.25 = 411.88 : x
2. Step 2: Convert to fraction form
   1,061.91/1,592.25 = 411.88/x
3. Step 3: Cross multiply
   1,061.91x = 1,592.25 × 411.88
4. Step 4: Simplify right side
   1,061.91x = 655,815.93
5. Step 5: Solve for x
   x = 655,815.93/1,061.91
6. Step 6: Final answer
   x = 617.58