Finding the Third Proportional to 383,321.50 and 561,040

Step by Step Solution

1. Step 1: Write the proportion equation
   383,321.50 : 561,040 = 561,040 : x
2. Step 2: Convert to fraction form
   383,321.50/561,040 = 561,040/x
3. Step 3: Cross multiply
   383,321.50x = 561,040 × 561,040
4. Step 4: Simplify right side
   383,321.50x = 314,765,881,600
5. Step 5: Solve for x
   x = 314,765,881,600/383,321.50
6. Step 6: Final answer
   x = 821,153.74