Finding the Fourth Proportional to 2,141.98, 3,214.13 and 971.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.98 : 3,214.13 = 971.90 : x
2. Step 2: Convert to fraction form
   2,141.98/3,214.13 = 971.90/x
3. Step 3: Cross multiply
   2,141.98x = 3,214.13 × 971.90
4. Step 4: Simplify right side
   2,141.98x = 3,123,809.54
5. Step 5: Solve for x
   x = 3,123,809.54/2,141.98
6. Step 6: Final answer
   x = 1,458.38