Finding the Third Proportional to 306,528 and 455,416.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,528 : 455,416.50 = 455,416.50 : x
2. Step 2: Convert to fraction form
   306,528/455,416.50 = 455,416.50/x
3. Step 3: Cross multiply
   306,528x = 455,416.50 × 455,416.50
4. Step 4: Simplify right side
   306,528x = 207,404,188,472.25
5. Step 5: Solve for x
   x = 207,404,188,472.25/306,528
6. Step 6: Final answer
   x = 676,623.96