Finding the Third Proportional to 306,406 and 472,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,406 : 472,528.50 = 472,528.50 : x
2. Step 2: Convert to fraction form
   306,406/472,528.50 = 472,528.50/x
3. Step 3: Cross multiply
   306,406x = 472,528.50 × 472,528.50
4. Step 4: Simplify right side
   306,406x = 223,283,183,312.25
5. Step 5: Solve for x
   x = 223,283,183,312.25/306,406
6. Step 6: Final answer
   x = 728,716.75