Finding the Third Proportional to 99,274 and 216,040

Step by Step Solution

1. Step 1: Write the proportion equation
   99,274 : 216,040 = 216,040 : x
2. Step 2: Convert to fraction form
   99,274/216,040 = 216,040/x
3. Step 3: Cross multiply
   99,274x = 216,040 × 216,040
4. Step 4: Simplify right side
   99,274x = 46,673,281,600
5. Step 5: Solve for x
   x = 46,673,281,600/99,274
6. Step 6: Final answer
   x = 470,146.08