Finding the Fourth Proportional to 1,061.56, 1,591.48 and 412.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.56 : 1,591.48 = 412.24 : x
2. Step 2: Convert to fraction form
   1,061.56/1,591.48 = 412.24/x
3. Step 3: Cross multiply
   1,061.56x = 1,591.48 × 412.24
4. Step 4: Simplify right side
   1,061.56x = 656,071.72
5. Step 5: Solve for x
   x = 656,071.72/1,061.56
6. Step 6: Final answer
   x = 618.03