Finding the Third Proportional to 328,122 and 469,213.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,122 : 469,213.50 = 469,213.50 : x
2. Step 2: Convert to fraction form
   328,122/469,213.50 = 469,213.50/x
3. Step 3: Cross multiply
   328,122x = 469,213.50 × 469,213.50
4. Step 4: Simplify right side
   328,122x = 220,161,308,582.25
5. Step 5: Solve for x
   x = 220,161,308,582.25/328,122
6. Step 6: Final answer
   x = 670,973.93