Finding the Third Proportional to 383,320.50 and 561,038.50

Step by Step Solution

1. Step 1: Write the proportion equation
   383,320.50 : 561,038.50 = 561,038.50 : x
2. Step 2: Convert to fraction form
   383,320.50/561,038.50 = 561,038.50/x
3. Step 3: Cross multiply
   383,320.50x = 561,038.50 × 561,038.50
4. Step 4: Simplify right side
   383,320.50x = 314,764,198,482.25
5. Step 5: Solve for x
   x = 314,764,198,482.25/383,320.50
6. Step 6: Final answer
   x = 821,151.49