Finding the Third Proportional to 123,099.75 and 283,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,099.75 : 283,621.50 = 283,621.50 : x
2. Step 2: Convert to fraction form
   123,099.75/283,621.50 = 283,621.50/x
3. Step 3: Cross multiply
   123,099.75x = 283,621.50 × 283,621.50
4. Step 4: Simplify right side
   123,099.75x = 80,441,155,262.25
5. Step 5: Solve for x
   x = 80,441,155,262.25/123,099.75
6. Step 6: Final answer
   x = 653,463.19