Finding the Fourth Proportional to 2,662.26, 3,994.20 and 930.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.26 : 3,994.20 = 930.90 : x
2. Step 2: Convert to fraction form
   2,662.26/3,994.20 = 930.90/x
3. Step 3: Cross multiply
   2,662.26x = 3,994.20 × 930.90
4. Step 4: Simplify right side
   2,662.26x = 3,718,200.78
5. Step 5: Solve for x
   x = 3,718,200.78/2,662.26
6. Step 6: Final answer
   x = 1,396.63