Finding the Fourth Proportional to 1,061.79, 1,592.69 and 412.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.79 : 1,592.69 = 412.38 : x
2. Step 2: Convert to fraction form
   1,061.79/1,592.69 = 412.38/x
3. Step 3: Cross multiply
   1,061.79x = 1,592.69 × 412.38
4. Step 4: Simplify right side
   1,061.79x = 656,793.50
5. Step 5: Solve for x
   x = 656,793.50/1,061.79
6. Step 6: Final answer
   x = 618.57