Finding the Third Proportional to 302,428.50 and 456,073.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,428.50 : 456,073.50 = 456,073.50 : x
2. Step 2: Convert to fraction form
   302,428.50/456,073.50 = 456,073.50/x
3. Step 3: Cross multiply
   302,428.50x = 456,073.50 × 456,073.50
4. Step 4: Simplify right side
   302,428.50x = 208,003,037,402.25
5. Step 5: Solve for x
   x = 208,003,037,402.25/302,428.50
6. Step 6: Final answer
   x = 687,775.91