Finding the Fourth Proportional to 1,061.10, 1,592.04 and 412.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.10 : 1,592.04 = 412.28 : x
2. Step 2: Convert to fraction form
   1,061.10/1,592.04 = 412.28/x
3. Step 3: Cross multiply
   1,061.10x = 1,592.04 × 412.28
4. Step 4: Simplify right side
   1,061.10x = 656,366.25
5. Step 5: Solve for x
   x = 656,366.25/1,061.10
6. Step 6: Final answer
   x = 618.57