Finding the Third Proportional to 400,533.50 and 619,976.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,533.50 : 619,976.50 = 619,976.50 : x
2. Step 2: Convert to fraction form
   400,533.50/619,976.50 = 619,976.50/x
3. Step 3: Cross multiply
   400,533.50x = 619,976.50 × 619,976.50
4. Step 4: Simplify right side
   400,533.50x = 384,370,860,552.25
5. Step 5: Solve for x
   x = 384,370,860,552.25/400,533.50
6. Step 6: Final answer
   x = 959,647.22