Finding the Fourth Proportional to 2,669.30, 4,003.93 and 721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.30 : 4,003.93 = 721.50 : x
2. Step 2: Convert to fraction form
   2,669.30/4,003.93 = 721.50/x
3. Step 3: Cross multiply
   2,669.30x = 4,003.93 × 721.50
4. Step 4: Simplify right side
   2,669.30x = 2,888,835.50
5. Step 5: Solve for x
   x = 2,888,835.50/2,669.30
6. Step 6: Final answer
   x = 1,082.24