Finding the Fourth Proportional to 1,061.18, 1,591.76 and 412.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.18 : 1,591.76 = 412.37 : x
2. Step 2: Convert to fraction form
   1,061.18/1,591.76 = 412.37/x
3. Step 3: Cross multiply
   1,061.18x = 1,591.76 × 412.37
4. Step 4: Simplify right side
   1,061.18x = 656,394.07
5. Step 5: Solve for x
   x = 656,394.07/1,061.18
6. Step 6: Final answer
   x = 618.55