Finding the Third Proportional to 218,150.50 and 320,043

Step by Step Solution

1. Step 1: Write the proportion equation
   218,150.50 : 320,043 = 320,043 : x
2. Step 2: Convert to fraction form
   218,150.50/320,043 = 320,043/x
3. Step 3: Cross multiply
   218,150.50x = 320,043 × 320,043
4. Step 4: Simplify right side
   218,150.50x = 102,427,521,849
5. Step 5: Solve for x
   x = 102,427,521,849/218,150.50
6. Step 6: Final answer
   x = 469,526.87