Finding the Third Proportional to 400,071 and 619,276.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,071 : 619,276.50 = 619,276.50 : x
2. Step 2: Convert to fraction form
   400,071/619,276.50 = 619,276.50/x
3. Step 3: Cross multiply
   400,071x = 619,276.50 × 619,276.50
4. Step 4: Simplify right side
   400,071x = 383,503,383,452.25
5. Step 5: Solve for x
   x = 383,503,383,452.25/400,071
6. Step 6: Final answer
   x = 958,588.31