Finding the Fourth Proportional to 1,114.32, 1,537.72 and 721.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.32 : 1,537.72 = 721.57 : x
2. Step 2: Convert to fraction form
   1,114.32/1,537.72 = 721.57/x
3. Step 3: Cross multiply
   1,114.32x = 1,537.72 × 721.57
4. Step 4: Simplify right side
   1,114.32x = 1,109,572.62
5. Step 5: Solve for x
   x = 1,109,572.62/1,114.32
6. Step 6: Final answer
   x = 995.74