Finding the Fourth Proportional to 2,146.55, 2,962.15 and 1,215.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.55 : 2,962.15 = 1,215.05 : x
2. Step 2: Convert to fraction form
   2,146.55/2,962.15 = 1,215.05/x
3. Step 3: Cross multiply
   2,146.55x = 2,962.15 × 1,215.05
4. Step 4: Simplify right side
   2,146.55x = 3,599,142.51
5. Step 5: Solve for x
   x = 3,599,142.51/2,146.55
6. Step 6: Final answer
   x = 1,676.71