Finding the Fourth Proportional to 1,061.43, 1,591.33 and 412.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.43 : 1,591.33 = 412.62 : x
2. Step 2: Convert to fraction form
   1,061.43/1,591.33 = 412.62/x
3. Step 3: Cross multiply
   1,061.43x = 1,591.33 × 412.62
4. Step 4: Simplify right side
   1,061.43x = 656,614.58
5. Step 5: Solve for x
   x = 656,614.58/1,061.43
6. Step 6: Final answer
   x = 618.61