Finding the Fourth Proportional to 2,617.47, 3,612.09 and 1,438.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.47 : 3,612.09 = 1,438.53 : x
2. Step 2: Convert to fraction form
   2,617.47/3,612.09 = 1,438.53/x
3. Step 3: Cross multiply
   2,617.47x = 3,612.09 × 1,438.53
4. Step 4: Simplify right side
   2,617.47x = 5,196,099.83
5. Step 5: Solve for x
   x = 5,196,099.83/2,617.47
6. Step 6: Final answer
   x = 1,985.16