Finding the Third Proportional to 282,663 and 615,262.50

Step by Step Solution

1. Step 1: Write the proportion equation
   282,663 : 615,262.50 = 615,262.50 : x
2. Step 2: Convert to fraction form
   282,663/615,262.50 = 615,262.50/x
3. Step 3: Cross multiply
   282,663x = 615,262.50 × 615,262.50
4. Step 4: Simplify right side
   282,663x = 378,547,943,906.25
5. Step 5: Solve for x
   x = 378,547,943,906.25/282,663
6. Step 6: Final answer
   x = 1,339,220.00