Finding the Third Proportional to 218,310 and 469,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,310 : 469,819.50 = 469,819.50 : x
2. Step 2: Convert to fraction form
   218,310/469,819.50 = 469,819.50/x
3. Step 3: Cross multiply
   218,310x = 469,819.50 × 469,819.50
4. Step 4: Simplify right side
   218,310x = 220,730,362,580.25
5. Step 5: Solve for x
   x = 220,730,362,580.25/218,310
6. Step 6: Final answer
   x = 1,011,086.81