Finding the Third Proportional to 321,614 and 428,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,614 : 428,760.50 = 428,760.50 : x
2. Step 2: Convert to fraction form
   321,614/428,760.50 = 428,760.50/x
3. Step 3: Cross multiply
   321,614x = 428,760.50 × 428,760.50
4. Step 4: Simplify right side
   321,614x = 183,835,566,360.25
5. Step 5: Solve for x
   x = 183,835,566,360.25/321,614
6. Step 6: Final answer
   x = 571,603.12