Finding the Fourth Proportional to 1,614.72, 2,228.28 and 906.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,614.72 : 2,228.28 = 906.60 : x
2. Step 2: Convert to fraction form
   1,614.72/2,228.28 = 906.60/x
3. Step 3: Cross multiply
   1,614.72x = 2,228.28 × 906.60
4. Step 4: Simplify right side
   1,614.72x = 2,020,158.65
5. Step 5: Solve for x
   x = 2,020,158.65/1,614.72
6. Step 6: Final answer
   x = 1,251.09