Finding the Fourth Proportional to 2,147.80, 2,962.56 and 1,705

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.80 : 2,962.56 = 1,705 : x
2. Step 2: Convert to fraction form
   2,147.80/2,962.56 = 1,705/x
3. Step 3: Cross multiply
   2,147.80x = 2,962.56 × 1,705
4. Step 4: Simplify right side
   2,147.80x = 5,051,164.80
5. Step 5: Solve for x
   x = 5,051,164.80/2,147.80
6. Step 6: Final answer
   x = 2,351.79