Finding the Third Proportional to 638,142 and 987,982.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,142 : 987,982.50 = 987,982.50 : x
2. Step 2: Convert to fraction form
   638,142/987,982.50 = 987,982.50/x
3. Step 3: Cross multiply
   638,142x = 987,982.50 × 987,982.50
4. Step 4: Simplify right side
   638,142x = 976,109,420,306.25
5. Step 5: Solve for x
   x = 976,109,420,306.25/638,142
6. Step 6: Final answer
   x = 1,529,611.62