Finding the Third Proportional to 99,342 and 215,616

Step by Step Solution

1. Step 1: Write the proportion equation
   99,342 : 215,616 = 215,616 : x
2. Step 2: Convert to fraction form
   99,342/215,616 = 215,616/x
3. Step 3: Cross multiply
   99,342x = 215,616 × 215,616
4. Step 4: Simplify right side
   99,342x = 46,490,259,456
5. Step 5: Solve for x
   x = 46,490,259,456/99,342
6. Step 6: Final answer
   x = 467,981.92