Finding the Third Proportional to 328,830 and 493,249.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,830 : 493,249.50 = 493,249.50 : x
2. Step 2: Convert to fraction form
   328,830/493,249.50 = 493,249.50/x
3. Step 3: Cross multiply
   328,830x = 493,249.50 × 493,249.50
4. Step 4: Simplify right side
   328,830x = 243,295,069,250.25
5. Step 5: Solve for x
   x = 243,295,069,250.25/328,830
6. Step 6: Final answer
   x = 739,881.00