Finding the Fourth Proportional to 2,617.50, 3,612.22 and 1,438.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.50 : 3,612.22 = 1,438.60 : x
2. Step 2: Convert to fraction form
   2,617.50/3,612.22 = 1,438.60/x
3. Step 3: Cross multiply
   2,617.50x = 3,612.22 × 1,438.60
4. Step 4: Simplify right side
   2,617.50x = 5,196,539.69
5. Step 5: Solve for x
   x = 5,196,539.69/2,617.50
6. Step 6: Final answer
   x = 1,985.31