Finding the Fourth Proportional to 2,315.72, 3,187.86 and 1,790.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.72 : 3,187.86 = 1,790.76 : x
2. Step 2: Convert to fraction form
   2,315.72/3,187.86 = 1,790.76/x
3. Step 3: Cross multiply
   2,315.72x = 3,187.86 × 1,790.76
4. Step 4: Simplify right side
   2,315.72x = 5,708,692.17
5. Step 5: Solve for x
   x = 5,708,692.17/2,315.72
6. Step 6: Final answer
   x = 2,465.19