Finding the Fourth Proportional to 2,766.42, 3,819.15 and 1,917

Step by Step Solution

1. Step 1: Write the proportion equation
   2,766.42 : 3,819.15 = 1,917 : x
2. Step 2: Convert to fraction form
   2,766.42/3,819.15 = 1,917/x
3. Step 3: Cross multiply
   2,766.42x = 3,819.15 × 1,917
4. Step 4: Simplify right side
   2,766.42x = 7,321,310.55
5. Step 5: Solve for x
   x = 7,321,310.55/2,766.42
6. Step 6: Final answer
   x = 2,646.49