Finding the Third Proportional to 400.50 and 1,053

Step by Step Solution

1. Step 1: Write the proportion equation
   400.50 : 1,053 = 1,053 : x
2. Step 2: Convert to fraction form
   400.50/1,053 = 1,053/x
3. Step 3: Cross multiply
   400.50x = 1,053 × 1,053
4. Step 4: Simplify right side
   400.50x = 1,108,809
5. Step 5: Solve for x
   x = 1,108,809/400.50
6. Step 6: Final answer
   x = 2,768.56