Finding the Fourth Proportional to 1,616.61, 2,421.71 and 1,268.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.61 : 2,421.71 = 1,268.31 : x
2. Step 2: Convert to fraction form
   1,616.61/2,421.71 = 1,268.31/x
3. Step 3: Cross multiply
   1,616.61x = 2,421.71 × 1,268.31
4. Step 4: Simplify right side
   1,616.61x = 3,071,479.01
5. Step 5: Solve for x
   x = 3,071,479.01/1,616.61
6. Step 6: Final answer
   x = 1,899.95