Finding the Third Proportional to 40,370 and 69,910

Step by Step Solution

1. Step 1: Write the proportion equation
   40,370 : 69,910 = 69,910 : x
2. Step 2: Convert to fraction form
   40,370/69,910 = 69,910/x
3. Step 3: Cross multiply
   40,370x = 69,910 × 69,910
4. Step 4: Simplify right side
   40,370x = 4,887,408,100
5. Step 5: Solve for x
   x = 4,887,408,100/40,370
6. Step 6: Final answer
   x = 121,065.35