Finding the Third Proportional to 328,642 and 529,105

Step by Step Solution

1. Step 1: Write the proportion equation
   328,642 : 529,105 = 529,105 : x
2. Step 2: Convert to fraction form
   328,642/529,105 = 529,105/x
3. Step 3: Cross multiply
   328,642x = 529,105 × 529,105
4. Step 4: Simplify right side
   328,642x = 279,952,101,025
5. Step 5: Solve for x
   x = 279,952,101,025/328,642
6. Step 6: Final answer
   x = 851,845.17