Finding the Fourth Proportional to 2,170.28, 2,994.81 and 1,226.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.28 : 2,994.81 = 1,226.15 : x
2. Step 2: Convert to fraction form
   2,170.28/2,994.81 = 1,226.15/x
3. Step 3: Cross multiply
   2,170.28x = 2,994.81 × 1,226.15
4. Step 4: Simplify right side
   2,170.28x = 3,672,094.86
5. Step 5: Solve for x
   x = 3,672,094.86/2,170.28
6. Step 6: Final answer
   x = 1,691.99