Finding the Fourth Proportional to 2,009.40, 2,772.99 and 1,170.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.40 : 2,772.99 = 1,170.15 : x
2. Step 2: Convert to fraction form
   2,009.40/2,772.99 = 1,170.15/x
3. Step 3: Cross multiply
   2,009.40x = 2,772.99 × 1,170.15
4. Step 4: Simplify right side
   2,009.40x = 3,244,814.25
5. Step 5: Solve for x
   x = 3,244,814.25/2,009.40
6. Step 6: Final answer
   x = 1,614.82