Finding the Third Proportional to 218,308.50 and 469,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,308.50 : 469,815.50 = 469,815.50 : x
2. Step 2: Convert to fraction form
   218,308.50/469,815.50 = 469,815.50/x
3. Step 3: Cross multiply
   218,308.50x = 469,815.50 × 469,815.50
4. Step 4: Simplify right side
   218,308.50x = 220,726,604,040.25
5. Step 5: Solve for x
   x = 220,726,604,040.25/218,308.50
6. Step 6: Final answer
   x = 1,011,076.55