Finding the Fourth Proportional to 1,068.52, 1,603.58 and 721.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.52 : 1,603.58 = 721.03 : x
2. Step 2: Convert to fraction form
   1,068.52/1,603.58 = 721.03/x
3. Step 3: Cross multiply
   1,068.52x = 1,603.58 × 721.03
4. Step 4: Simplify right side
   1,068.52x = 1,156,221.27
5. Step 5: Solve for x
   x = 1,156,221.27/1,068.52
6. Step 6: Final answer
   x = 1,082.08