Finding the Fourth Proportional to 2,009.40, 3,012.18 and 914.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.40 : 3,012.18 = 914.28 : x
2. Step 2: Convert to fraction form
   2,009.40/3,012.18 = 914.28/x
3. Step 3: Cross multiply
   2,009.40x = 3,012.18 × 914.28
4. Step 4: Simplify right side
   2,009.40x = 2,753,975.93
5. Step 5: Solve for x
   x = 2,753,975.93/2,009.40
6. Step 6: Final answer
   x = 1,370.55