Finding the Fourth Proportional to 2,171.88, 2,997.54 and 1,227.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.88 : 2,997.54 = 1,227.78 : x
2. Step 2: Convert to fraction form
   2,171.88/2,997.54 = 1,227.78/x
3. Step 3: Cross multiply
   2,171.88x = 2,997.54 × 1,227.78
4. Step 4: Simplify right side
   2,171.88x = 3,680,319.66
5. Step 5: Solve for x
   x = 3,680,319.66/2,171.88
6. Step 6: Final answer
   x = 1,694.53