Finding the Fourth Proportional to 2,616.09, 3,925.28 and 1,229.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.09 : 3,925.28 = 1,229.31 : x
2. Step 2: Convert to fraction form
   2,616.09/3,925.28 = 1,229.31/x
3. Step 3: Cross multiply
   2,616.09x = 3,925.28 × 1,229.31
4. Step 4: Simplify right side
   2,616.09x = 4,825,379.81
5. Step 5: Solve for x
   x = 4,825,379.81/2,616.09
6. Step 6: Final answer
   x = 1,844.50