Finding the Fourth Proportional to 1,722.72, 2,377.36 and 936.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.72 : 2,377.36 = 936.76 : x
2. Step 2: Convert to fraction form
   1,722.72/2,377.36 = 936.76/x
3. Step 3: Cross multiply
   1,722.72x = 2,377.36 × 936.76
4. Step 4: Simplify right side
   1,722.72x = 2,227,011.07
5. Step 5: Solve for x
   x = 2,227,011.07/1,722.72
6. Step 6: Final answer
   x = 1,292.73