Finding the Fourth Proportional to 2,853.56, 4,280.62 and 906.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.56 : 4,280.62 = 906.06 : x
2. Step 2: Convert to fraction form
   2,853.56/4,280.62 = 906.06/x
3. Step 3: Cross multiply
   2,853.56x = 4,280.62 × 906.06
4. Step 4: Simplify right side
   2,853.56x = 3,878,498.56
5. Step 5: Solve for x
   x = 3,878,498.56/2,853.56
6. Step 6: Final answer
   x = 1,359.18