Finding the Fourth Proportional to 2,611.63, 3,910.56 and 2,089.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.63 : 3,910.56 = 2,089.18 : x
2. Step 2: Convert to fraction form
   2,611.63/3,910.56 = 2,089.18/x
3. Step 3: Cross multiply
   2,611.63x = 3,910.56 × 2,089.18
4. Step 4: Simplify right side
   2,611.63x = 8,169,863.74
5. Step 5: Solve for x
   x = 8,169,863.74/2,611.63
6. Step 6: Final answer
   x = 3,128.26