Finding the Fourth Proportional to 1,343.70, 1,854.72 and 872.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.70 : 1,854.72 = 872.28 : x
2. Step 2: Convert to fraction form
   1,343.70/1,854.72 = 872.28/x
3. Step 3: Cross multiply
   1,343.70x = 1,854.72 × 872.28
4. Step 4: Simplify right side
   1,343.70x = 1,617,835.16
5. Step 5: Solve for x
   x = 1,617,835.16/1,343.70
6. Step 6: Final answer
   x = 1,204.02