Finding the Fourth Proportional to 2,148.66, 2,965.59 and 1,217.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.66 : 2,965.59 = 1,217.34 : x
2. Step 2: Convert to fraction form
   2,148.66/2,965.59 = 1,217.34/x
3. Step 3: Cross multiply
   2,148.66x = 2,965.59 × 1,217.34
4. Step 4: Simplify right side
   2,148.66x = 3,610,131.33
5. Step 5: Solve for x
   x = 3,610,131.33/2,148.66
6. Step 6: Final answer
   x = 1,680.18