Finding the Fourth Proportional to 2,111.34, 3,164.70 and 723.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.34 : 3,164.70 = 723.36 : x
2. Step 2: Convert to fraction form
   2,111.34/3,164.70 = 723.36/x
3. Step 3: Cross multiply
   2,111.34x = 3,164.70 × 723.36
4. Step 4: Simplify right side
   2,111.34x = 2,289,217.39
5. Step 5: Solve for x
   x = 2,289,217.39/2,111.34
6. Step 6: Final answer
   x = 1,084.25