Finding the Fourth Proportional to 1,452.17, 2,176.72 and 721.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,452.17 : 2,176.72 = 721.34 : x
2. Step 2: Convert to fraction form
   1,452.17/2,176.72 = 721.34/x
3. Step 3: Cross multiply
   1,452.17x = 2,176.72 × 721.34
4. Step 4: Simplify right side
   1,452.17x = 1,570,155.20
5. Step 5: Solve for x
   x = 1,570,155.20/1,452.17
6. Step 6: Final answer
   x = 1,081.25