Finding the Third Proportional to 158,610 and 215,308

Step by Step Solution

1. Step 1: Write the proportion equation
   158,610 : 215,308 = 215,308 : x
2. Step 2: Convert to fraction form
   158,610/215,308 = 215,308/x
3. Step 3: Cross multiply
   158,610x = 215,308 × 215,308
4. Step 4: Simplify right side
   158,610x = 46,357,534,864
5. Step 5: Solve for x
   x = 46,357,534,864/158,610
6. Step 6: Final answer
   x = 292,273.72