Finding the Fourth Proportional to 1,343.40, 1,852.89 and 971.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.40 : 1,852.89 = 971.61 : x
2. Step 2: Convert to fraction form
   1,343.40/1,852.89 = 971.61/x
3. Step 3: Cross multiply
   1,343.40x = 1,852.89 × 971.61
4. Step 4: Simplify right side
   1,343.40x = 1,800,286.45
5. Step 5: Solve for x
   x = 1,800,286.45/1,343.40
6. Step 6: Final answer
   x = 1,340.10