Finding the Third Proportional to 218,308.50 and 469,815

Step by Step Solution

1. Step 1: Write the proportion equation
   218,308.50 : 469,815 = 469,815 : x
2. Step 2: Convert to fraction form
   218,308.50/469,815 = 469,815/x
3. Step 3: Cross multiply
   218,308.50x = 469,815 × 469,815
4. Step 4: Simplify right side
   218,308.50x = 220,726,134,225
5. Step 5: Solve for x
   x = 220,726,134,225/218,308.50
6. Step 6: Final answer
   x = 1,011,074.39