Finding the Fourth Proportional to 1,343.91, 1,854.32 and 971.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.91 : 1,854.32 = 971.72 : x
2. Step 2: Convert to fraction form
   1,343.91/1,854.32 = 971.72/x
3. Step 3: Cross multiply
   1,343.91x = 1,854.32 × 971.72
4. Step 4: Simplify right side
   1,343.91x = 1,801,865.70
5. Step 5: Solve for x
   x = 1,801,865.70/1,343.91
6. Step 6: Final answer
   x = 1,340.76