Finding the Third Proportional to 638,087 and 988,500

Step by Step Solution

1. Step 1: Write the proportion equation
   638,087 : 988,500 = 988,500 : x
2. Step 2: Convert to fraction form
   638,087/988,500 = 988,500/x
3. Step 3: Cross multiply
   638,087x = 988,500 × 988,500
4. Step 4: Simplify right side
   638,087x = 977,132,250,000
5. Step 5: Solve for x
   x = 977,132,250,000/638,087
6. Step 6: Final answer
   x = 1,531,346.43