Finding the Fourth Proportional to 2,309.92, 3,187.51 and 1,315.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.92 : 3,187.51 = 1,315.00 : x
2. Step 2: Convert to fraction form
   2,309.92/3,187.51 = 1,315.00/x
3. Step 3: Cross multiply
   2,309.92x = 3,187.51 × 1,315.00
4. Step 4: Simplify right side
   2,309.92x = 4,191,553.14
5. Step 5: Solve for x
   x = 4,191,553.14/2,309.92
6. Step 6: Final answer
   x = 1,814.59