Finding the Third Proportional to 206,428.50 and 427,015.69

Step by Step Solution

1. Step 1: Write the proportion equation
   206,428.50 : 427,015.69 = 427,015.69 : x
2. Step 2: Convert to fraction form
   206,428.50/427,015.69 = 427,015.69/x
3. Step 3: Cross multiply
   206,428.50x = 427,015.69 × 427,015.69
4. Step 4: Simplify right side
   206,428.50x = 182,342,397,371.10
5. Step 5: Solve for x
   x = 182,342,397,371.10/206,428.50
6. Step 6: Final answer
   x = 883,319.88