Finding the Third Proportional to 646,906 and 926,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   646,906 : 926,321.50 = 926,321.50 : x
2. Step 2: Convert to fraction form
   646,906/926,321.50 = 926,321.50/x
3. Step 3: Cross multiply
   646,906x = 926,321.50 × 926,321.50
4. Step 4: Simplify right side
   646,906x = 858,071,521,362.25
5. Step 5: Solve for x
   x = 858,071,521,362.25/646,906
6. Step 6: Final answer
   x = 1,326,423.81