Finding the Third Proportional to 813.38 and 1,808.72

Step by Step Solution

1. Step 1: Write the proportion equation
   813.38 : 1,808.72 = 1,808.72 : x
2. Step 2: Convert to fraction form
   813.38/1,808.72 = 1,808.72/x
3. Step 3: Cross multiply
   813.38x = 1,808.72 × 1,808.72
4. Step 4: Simplify right side
   813.38x = 3,271,463.52
5. Step 5: Solve for x
   x = 3,271,463.52/813.38
6. Step 6: Final answer
   x = 4,022.09