Finding the Fourth Proportional to 2,081.19, 3,122.12 and 971.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.19 : 3,122.12 = 971.72 : x
2. Step 2: Convert to fraction form
   2,081.19/3,122.12 = 971.72/x
3. Step 3: Cross multiply
   2,081.19x = 3,122.12 × 971.72
4. Step 4: Simplify right side
   2,081.19x = 3,033,813.27
5. Step 5: Solve for x
   x = 3,033,813.27/2,081.19
6. Step 6: Final answer
   x = 1,457.73