Finding the Third Proportional to 803.53 and 1,222.59

Step by Step Solution

1. Step 1: Write the proportion equation
   803.53 : 1,222.59 = 1,222.59 : x
2. Step 2: Convert to fraction form
   803.53/1,222.59 = 1,222.59/x
3. Step 3: Cross multiply
   803.53x = 1,222.59 × 1,222.59
4. Step 4: Simplify right side
   803.53x = 1,494,735.48
5. Step 5: Solve for x
   x = 1,494,735.48/803.53
6. Step 6: Final answer
   x = 1,860.21