Finding the Third Proportional to 158,426 and 215,228

Step by Step Solution

1. Step 1: Write the proportion equation
   158,426 : 215,228 = 215,228 : x
2. Step 2: Convert to fraction form
   158,426/215,228 = 215,228/x
3. Step 3: Cross multiply
   158,426x = 215,228 × 215,228
4. Step 4: Simplify right side
   158,426x = 46,323,091,984
5. Step 5: Solve for x
   x = 46,323,091,984/158,426
6. Step 6: Final answer
   x = 292,395.77