Finding the Fourth Proportional to 2,310.55, 3,188.59 and 1,315.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.55 : 3,188.59 = 1,315.92 : x
2. Step 2: Convert to fraction form
   2,310.55/3,188.59 = 1,315.92/x
3. Step 3: Cross multiply
   2,310.55x = 3,188.59 × 1,315.92
4. Step 4: Simplify right side
   2,310.55x = 4,195,932.75
5. Step 5: Solve for x
   x = 4,195,932.75/2,310.55
6. Step 6: Final answer
   x = 1,815.99