Finding the Fourth Proportional to 2,612.76, 3,922.61 and 1,517.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.76 : 3,922.61 = 1,517.91 : x
2. Step 2: Convert to fraction form
   2,612.76/3,922.61 = 1,517.91/x
3. Step 3: Cross multiply
   2,612.76x = 3,922.61 × 1,517.91
4. Step 4: Simplify right side
   2,612.76x = 5,954,172.74
5. Step 5: Solve for x
   x = 5,954,172.74/2,612.76
6. Step 6: Final answer
   x = 2,278.88