Finding the Fourth Proportional to 2,147.08, 2,962.89 and 1,215.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.08 : 2,962.89 = 1,215.58 : x
2. Step 2: Convert to fraction form
   2,147.08/2,962.89 = 1,215.58/x
3. Step 3: Cross multiply
   2,147.08x = 2,962.89 × 1,215.58
4. Step 4: Simplify right side
   2,147.08x = 3,601,629.83
5. Step 5: Solve for x
   x = 3,601,629.83/2,147.08
6. Step 6: Final answer
   x = 1,677.45