Finding the Fourth Proportional to 2,275.72, 3,138.42 and 1,490.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.72 : 3,138.42 = 1,490.02 : x
2. Step 2: Convert to fraction form
   2,275.72/3,138.42 = 1,490.02/x
3. Step 3: Cross multiply
   2,275.72x = 3,138.42 × 1,490.02
4. Step 4: Simplify right side
   2,275.72x = 4,676,308.57
5. Step 5: Solve for x
   x = 4,676,308.57/2,275.72
6. Step 6: Final answer
   x = 2,054.87