Finding the Fourth Proportional to 2,017.35, 2,781.72 and 1,643.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.35 : 2,781.72 = 1,643.67 : x
2. Step 2: Convert to fraction form
   2,017.35/2,781.72 = 1,643.67/x
3. Step 3: Cross multiply
   2,017.35x = 2,781.72 × 1,643.67
4. Step 4: Simplify right side
   2,017.35x = 4,572,229.71
5. Step 5: Solve for x
   x = 4,572,229.71/2,017.35
6. Step 6: Final answer
   x = 2,266.45