Finding the Fourth Proportional to 1,074.67, 1,483.72 and 721.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.67 : 1,483.72 = 721.10 : x
2. Step 2: Convert to fraction form
   1,074.67/1,483.72 = 721.10/x
3. Step 3: Cross multiply
   1,074.67x = 1,483.72 × 721.10
4. Step 4: Simplify right side
   1,074.67x = 1,069,912.40
5. Step 5: Solve for x
   x = 1,069,912.40/1,074.67
6. Step 6: Final answer
   x = 995.58