Finding the Third Proportional to 206,650.50 and 438,100

Step by Step Solution

1. Step 1: Write the proportion equation
   206,650.50 : 438,100 = 438,100 : x
2. Step 2: Convert to fraction form
   206,650.50/438,100 = 438,100/x
3. Step 3: Cross multiply
   206,650.50x = 438,100 × 438,100
4. Step 4: Simplify right side
   206,650.50x = 191,931,610,000
5. Step 5: Solve for x
   x = 191,931,610,000/206,650.50
6. Step 6: Final answer
   x = 928,773.99