Finding the Fourth Proportional to 2,190.69, 3,284.89 and 803.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.69 : 3,284.89 = 803.67 : x
2. Step 2: Convert to fraction form
   2,190.69/3,284.89 = 803.67/x
3. Step 3: Cross multiply
   2,190.69x = 3,284.89 × 803.67
4. Step 4: Simplify right side
   2,190.69x = 2,639,967.55
5. Step 5: Solve for x
   x = 2,639,967.55/2,190.69
6. Step 6: Final answer
   x = 1,205.08