Finding the Fourth Proportional to 2,315.25, 3,195.05 and 1,267.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.25 : 3,195.05 = 1,267.31 : x
2. Step 2: Convert to fraction form
   2,315.25/3,195.05 = 1,267.31/x
3. Step 3: Cross multiply
   2,315.25x = 3,195.05 × 1,267.31
4. Step 4: Simplify right side
   2,315.25x = 4,049,120.47
5. Step 5: Solve for x
   x = 4,049,120.47/2,315.25
6. Step 6: Final answer
   x = 1,748.89