Finding the Fourth Proportional to 2,617.73, 3,612.43 and 1,438.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.73 : 3,612.43 = 1,438.79 : x
2. Step 2: Convert to fraction form
   2,617.73/3,612.43 = 1,438.79/x
3. Step 3: Cross multiply
   2,617.73x = 3,612.43 × 1,438.79
4. Step 4: Simplify right side
   2,617.73x = 5,197,506.50
5. Step 5: Solve for x
   x = 5,197,506.50/2,617.73
6. Step 6: Final answer
   x = 1,985.51