Finding the Third Proportional to 328,423.50 and 699,219

Step by Step Solution

1. Step 1: Write the proportion equation
   328,423.50 : 699,219 = 699,219 : x
2. Step 2: Convert to fraction form
   328,423.50/699,219 = 699,219/x
3. Step 3: Cross multiply
   328,423.50x = 699,219 × 699,219
4. Step 4: Simplify right side
   328,423.50x = 488,907,209,961
5. Step 5: Solve for x
   x = 488,907,209,961/328,423.50
6. Step 6: Final answer
   x = 1,488,648.68