Finding the Fourth Proportional to 1,114.72, 1,538.39 and 722.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.72 : 1,538.39 = 722.88 : x
2. Step 2: Convert to fraction form
   1,114.72/1,538.39 = 722.88/x
3. Step 3: Cross multiply
   1,114.72x = 1,538.39 × 722.88
4. Step 4: Simplify right side
   1,114.72x = 1,112,073.17
5. Step 5: Solve for x
   x = 1,112,073.17/1,114.72
6. Step 6: Final answer
   x = 997.63