Finding the Fourth Proportional to 2,650.86, 3,979.15 and 1,994.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.86 : 3,979.15 = 1,994.60 : x
2. Step 2: Convert to fraction form
   2,650.86/3,979.15 = 1,994.60/x
3. Step 3: Cross multiply
   2,650.86x = 3,979.15 × 1,994.60
4. Step 4: Simplify right side
   2,650.86x = 7,936,817.55
5. Step 5: Solve for x
   x = 7,936,817.55/2,650.86
6. Step 6: Final answer
   x = 2,994.05