Finding the Third Proportional to 63,990 and 100,521

Step by Step Solution

1. Step 1: Write the proportion equation
   63,990 : 100,521 = 100,521 : x
2. Step 2: Convert to fraction form
   63,990/100,521 = 100,521/x
3. Step 3: Cross multiply
   63,990x = 100,521 × 100,521
4. Step 4: Simplify right side
   63,990x = 10,104,471,441
5. Step 5: Solve for x
   x = 10,104,471,441/63,990
6. Step 6: Final answer
   x = 157,907.04