Finding the Fourth Proportional to 2,146.80, 2,962.56 and 1,215.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.80 : 2,962.56 = 1,215.24 : x
2. Step 2: Convert to fraction form
   2,146.80/2,962.56 = 1,215.24/x
3. Step 3: Cross multiply
   2,146.80x = 2,962.56 × 1,215.24
4. Step 4: Simplify right side
   2,146.80x = 3,600,221.41
5. Step 5: Solve for x
   x = 3,600,221.41/2,146.80
6. Step 6: Final answer
   x = 1,677.02