Finding the Fourth Proportional to 1,229.86, 1,845.37 and 613.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.86 : 1,845.37 = 613.62 : x
2. Step 2: Convert to fraction form
   1,229.86/1,845.37 = 613.62/x
3. Step 3: Cross multiply
   1,229.86x = 1,845.37 × 613.62
4. Step 4: Simplify right side
   1,229.86x = 1,132,351.52
5. Step 5: Solve for x
   x = 1,132,351.52/1,229.86
6. Step 6: Final answer
   x = 920.71