Finding the Fourth Proportional to 2,315.72, 3,468.71 and 1,690.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.72 : 3,468.71 = 1,690.61 : x
2. Step 2: Convert to fraction form
   2,315.72/3,468.71 = 1,690.61/x
3. Step 3: Cross multiply
   2,315.72x = 3,468.71 × 1,690.61
4. Step 4: Simplify right side
   2,315.72x = 5,864,210.02
5. Step 5: Solve for x
   x = 5,864,210.02/2,315.72
6. Step 6: Final answer
   x = 2,532.35