Finding the Third Proportional to 640,981 and 996,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   640,981 : 996,436.50 = 996,436.50 : x
2. Step 2: Convert to fraction form
   640,981/996,436.50 = 996,436.50/x
3. Step 3: Cross multiply
   640,981x = 996,436.50 × 996,436.50
4. Step 4: Simplify right side
   640,981x = 992,885,698,532.25
5. Step 5: Solve for x
   x = 992,885,698,532.25/640,981
6. Step 6: Final answer
   x = 1,549,009.56