Finding the Fourth Proportional to 2,609.97, 3,910.86 and 1,438.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.97 : 3,910.86 = 1,438.98 : x
2. Step 2: Convert to fraction form
   2,609.97/3,910.86 = 1,438.98/x
3. Step 3: Cross multiply
   2,609.97x = 3,910.86 × 1,438.98
4. Step 4: Simplify right side
   2,609.97x = 5,627,649.32
5. Step 5: Solve for x
   x = 5,627,649.32/2,609.97
6. Step 6: Final answer
   x = 2,156.21