Finding the Fourth Proportional to 1,690.33, 2,315.71 and 1,627.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.33 : 2,315.71 = 1,627.16 : x
2. Step 2: Convert to fraction form
   1,690.33/2,315.71 = 1,627.16/x
3. Step 3: Cross multiply
   1,690.33x = 2,315.71 × 1,627.16
4. Step 4: Simplify right side
   1,690.33x = 3,768,019.11
5. Step 5: Solve for x
   x = 3,768,019.11/1,690.33
6. Step 6: Final answer
   x = 2,229.16