Finding the Fourth Proportional to 2,171.46, 2,996.24 and 1,287.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.46 : 2,996.24 = 1,287.48 : x
2. Step 2: Convert to fraction form
   2,171.46/2,996.24 = 1,287.48/x
3. Step 3: Cross multiply
   2,171.46x = 2,996.24 × 1,287.48
4. Step 4: Simplify right side
   2,171.46x = 3,857,592.64
5. Step 5: Solve for x
   x = 3,857,592.64/2,171.46
6. Step 6: Final answer
   x = 1,776.50