Finding the Third Proportional to 99,480 and 216,274

Step by Step Solution

1. Step 1: Write the proportion equation
   99,480 : 216,274 = 216,274 : x
2. Step 2: Convert to fraction form
   99,480/216,274 = 216,274/x
3. Step 3: Cross multiply
   99,480x = 216,274 × 216,274
4. Step 4: Simplify right side
   99,480x = 46,774,443,076
5. Step 5: Solve for x
   x = 46,774,443,076/99,480
6. Step 6: Final answer
   x = 470,189.42