Finding the Third Proportional to 55,065 and 87,521

Step by Step Solution

1. Step 1: Write the proportion equation
   55,065 : 87,521 = 87,521 : x
2. Step 2: Convert to fraction form
   55,065/87,521 = 87,521/x
3. Step 3: Cross multiply
   55,065x = 87,521 × 87,521
4. Step 4: Simplify right side
   55,065x = 7,659,925,441
5. Step 5: Solve for x
   x = 7,659,925,441/55,065
6. Step 6: Final answer
   x = 139,106.97