Finding the Fourth Proportional to 1,253.27, 1,729.42 and 722.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253.27 : 1,729.42 = 722.12 : x
2. Step 2: Convert to fraction form
   1,253.27/1,729.42 = 722.12/x
3. Step 3: Cross multiply
   1,253.27x = 1,729.42 × 722.12
4. Step 4: Simplify right side
   1,253.27x = 1,248,848.77
5. Step 5: Solve for x
   x = 1,248,848.77/1,253.27
6. Step 6: Final answer
   x = 996.47