Finding the Fourth Proportional to 1,500.69, 2,251.59 and 721.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.69 : 2,251.59 = 721.02 : x
2. Step 2: Convert to fraction form
   1,500.69/2,251.59 = 721.02/x
3. Step 3: Cross multiply
   1,500.69x = 2,251.59 × 721.02
4. Step 4: Simplify right side
   1,500.69x = 1,623,441.42
5. Step 5: Solve for x
   x = 1,623,441.42/1,500.69
6. Step 6: Final answer
   x = 1,081.80