Finding the Fourth Proportional to 2,290.30, 3,438.15 and 1,303.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.30 : 3,438.15 = 1,303.90 : x
2. Step 2: Convert to fraction form
   2,290.30/3,438.15 = 1,303.90/x
3. Step 3: Cross multiply
   2,290.30x = 3,438.15 × 1,303.90
4. Step 4: Simplify right side
   2,290.30x = 4,483,003.79
5. Step 5: Solve for x
   x = 4,483,003.79/2,290.30
6. Step 6: Final answer
   x = 1,957.39