Finding the Third Proportional to 216,301.50 and 322,659

Step by Step Solution

1. Step 1: Write the proportion equation
   216,301.50 : 322,659 = 322,659 : x
2. Step 2: Convert to fraction form
   216,301.50/322,659 = 322,659/x
3. Step 3: Cross multiply
   216,301.50x = 322,659 × 322,659
4. Step 4: Simplify right side
   216,301.50x = 104,108,830,281
5. Step 5: Solve for x
   x = 104,108,830,281/216,301.50
6. Step 6: Final answer
   x = 481,313.49