Finding the Fourth Proportional to 2,148.72, 2,964.96 and 1,217.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.72 : 2,964.96 = 1,217.22 : x
2. Step 2: Convert to fraction form
   2,148.72/2,964.96 = 1,217.22/x
3. Step 3: Cross multiply
   2,148.72x = 2,964.96 × 1,217.22
4. Step 4: Simplify right side
   2,148.72x = 3,609,008.61
5. Step 5: Solve for x
   x = 3,609,008.61/2,148.72
6. Step 6: Final answer
   x = 1,679.61