Finding the Third Proportional to 99,320 and 216,152

Step by Step Solution

1. Step 1: Write the proportion equation
   99,320 : 216,152 = 216,152 : x
2. Step 2: Convert to fraction form
   99,320/216,152 = 216,152/x
3. Step 3: Cross multiply
   99,320x = 216,152 × 216,152
4. Step 4: Simplify right side
   99,320x = 46,721,687,104
5. Step 5: Solve for x
   x = 46,721,687,104/99,320
6. Step 6: Final answer
   x = 470,415.70