Finding the Third Proportional to 218,162.25 and 320,061

Step by Step Solution

1. Step 1: Write the proportion equation
   218,162.25 : 320,061 = 320,061 : x
2. Step 2: Convert to fraction form
   218,162.25/320,061 = 320,061/x
3. Step 3: Cross multiply
   218,162.25x = 320,061 × 320,061
4. Step 4: Simplify right side
   218,162.25x = 102,439,043,721
5. Step 5: Solve for x
   x = 102,439,043,721/218,162.25
6. Step 6: Final answer
   x = 469,554.40