Finding the Fourth Proportional to 1,061.36, 1,592.55 and 411.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.36 : 1,592.55 = 411.95 : x
2. Step 2: Convert to fraction form
   1,061.36/1,592.55 = 411.95/x
3. Step 3: Cross multiply
   1,061.36x = 1,592.55 × 411.95
4. Step 4: Simplify right side
   1,061.36x = 656,043.01
5. Step 5: Solve for x
   x = 656,043.01/1,061.36
6. Step 6: Final answer
   x = 618.12