Finding the Third Proportional to 638,295 and 988,300

Step by Step Solution

1. Step 1: Write the proportion equation
   638,295 : 988,300 = 988,300 : x
2. Step 2: Convert to fraction form
   638,295/988,300 = 988,300/x
3. Step 3: Cross multiply
   638,295x = 988,300 × 988,300
4. Step 4: Simplify right side
   638,295x = 976,736,890,000
5. Step 5: Solve for x
   x = 976,736,890,000/638,295
6. Step 6: Final answer
   x = 1,530,228.01