Finding the Fourth Proportional to 2,617.32, 3,922.64 and 1,227.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.32 : 3,922.64 = 1,227.60 : x
2. Step 2: Convert to fraction form
   2,617.32/3,922.64 = 1,227.60/x
3. Step 3: Cross multiply
   2,617.32x = 3,922.64 × 1,227.60
4. Step 4: Simplify right side
   2,617.32x = 4,815,432.86
5. Step 5: Solve for x
   x = 4,815,432.86/2,617.32
6. Step 6: Final answer
   x = 1,839.83