Finding the Fourth Proportional to 2,617.56, 3,612.27 and 1,438.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.56 : 3,612.27 = 1,438.74 : x
2. Step 2: Convert to fraction form
   2,617.56/3,612.27 = 1,438.74/x
3. Step 3: Cross multiply
   2,617.56x = 3,612.27 × 1,438.74
4. Step 4: Simplify right side
   2,617.56x = 5,197,117.34
5. Step 5: Solve for x
   x = 5,197,117.34/2,617.56
6. Step 6: Final answer
   x = 1,985.48