Finding the Fourth Proportional to 2,290.20, 3,160.55 and 1,295.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.20 : 3,160.55 = 1,295.46 : x
2. Step 2: Convert to fraction form
   2,290.20/3,160.55 = 1,295.46/x
3. Step 3: Cross multiply
   2,290.20x = 3,160.55 × 1,295.46
4. Step 4: Simplify right side
   2,290.20x = 4,094,362.86
5. Step 5: Solve for x
   x = 4,094,362.86/2,290.20
6. Step 6: Final answer
   x = 1,787.77