Finding the Third Proportional to 644,179.50 and 946,585.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,179.50 : 946,585.50 = 946,585.50 : x
2. Step 2: Convert to fraction form
   644,179.50/946,585.50 = 946,585.50/x
3. Step 3: Cross multiply
   644,179.50x = 946,585.50 × 946,585.50
4. Step 4: Simplify right side
   644,179.50x = 896,024,108,810.25
5. Step 5: Solve for x
   x = 896,024,108,810.25/644,179.50
6. Step 6: Final answer
   x = 1,390,954.09