Finding the Fourth Proportional to 2,617.07, 3,611.61 and 1,438.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.07 : 3,611.61 = 1,438.16 : x
2. Step 2: Convert to fraction form
   2,617.07/3,611.61 = 1,438.16/x
3. Step 3: Cross multiply
   2,617.07x = 3,611.61 × 1,438.16
4. Step 4: Simplify right side
   2,617.07x = 5,194,054.98
5. Step 5: Solve for x
   x = 5,194,054.98/2,617.07
6. Step 6: Final answer
   x = 1,984.69