Finding the Fourth Proportional to 2,171.98, 2,998.47 and 1,375.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.98 : 2,998.47 = 1,375.57 : x
2. Step 2: Convert to fraction form
   2,171.98/2,998.47 = 1,375.57/x
3. Step 3: Cross multiply
   2,171.98x = 2,998.47 × 1,375.57
4. Step 4: Simplify right side
   2,171.98x = 4,124,605.38
5. Step 5: Solve for x
   x = 4,124,605.38/2,171.98
6. Step 6: Final answer
   x = 1,899.01