Finding the Third Proportional to 218,299.50 and 326,106

Step by Step Solution

1. Step 1: Write the proportion equation
   218,299.50 : 326,106 = 326,106 : x
2. Step 2: Convert to fraction form
   218,299.50/326,106 = 326,106/x
3. Step 3: Cross multiply
   218,299.50x = 326,106 × 326,106
4. Step 4: Simplify right side
   218,299.50x = 106,345,123,236
5. Step 5: Solve for x
   x = 106,345,123,236/218,299.50
6. Step 6: Final answer
   x = 487,152.39