Finding the Fourth Proportional to 2,309.74, 3,187.37 and 1,315.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.74 : 3,187.37 = 1,315.16 : x
2. Step 2: Convert to fraction form
   2,309.74/3,187.37 = 1,315.16/x
3. Step 3: Cross multiply
   2,309.74x = 3,187.37 × 1,315.16
4. Step 4: Simplify right side
   2,309.74x = 4,191,901.53
5. Step 5: Solve for x
   x = 4,191,901.53/2,309.74
6. Step 6: Final answer
   x = 1,814.88