Finding the Fourth Proportional to 2,171.90, 2,997.25 and 1,275.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.90 : 2,997.25 = 1,275.50 : x
2. Step 2: Convert to fraction form
   2,171.90/2,997.25 = 1,275.50/x
3. Step 3: Cross multiply
   2,171.90x = 2,997.25 × 1,275.50
4. Step 4: Simplify right side
   2,171.90x = 3,822,996.68
5. Step 5: Solve for x
   x = 3,822,996.68/2,171.90
6. Step 6: Final answer
   x = 1,760.21