Finding the Fourth Proportional to 2,101.47, 2,899.83 and 1,217.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.47 : 2,899.83 = 1,217.33 : x
2. Step 2: Convert to fraction form
   2,101.47/2,899.83 = 1,217.33/x
3. Step 3: Cross multiply
   2,101.47x = 2,899.83 × 1,217.33
4. Step 4: Simplify right side
   2,101.47x = 3,530,035.55
5. Step 5: Solve for x
   x = 3,530,035.55/2,101.47
6. Step 6: Final answer
   x = 1,679.79