Finding the Third Proportional to 328,623 and 529,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,623 : 529,078.50 = 529,078.50 : x
2. Step 2: Convert to fraction form
   328,623/529,078.50 = 529,078.50/x
3. Step 3: Cross multiply
   328,623x = 529,078.50 × 529,078.50
4. Step 4: Simplify right side
   328,623x = 279,924,059,162.25
5. Step 5: Solve for x
   x = 279,924,059,162.25/328,623
6. Step 6: Final answer
   x = 851,809.09