Finding the Third Proportional to 638,572.50 and 981,823.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,572.50 : 981,823.50 = 981,823.50 : x
2. Step 2: Convert to fraction form
   638,572.50/981,823.50 = 981,823.50/x
3. Step 3: Cross multiply
   638,572.50x = 981,823.50 × 981,823.50
4. Step 4: Simplify right side
   638,572.50x = 963,977,385,152.25
5. Step 5: Solve for x
   x = 963,977,385,152.25/638,572.50
6. Step 6: Final answer
   x = 1,509,581.74