Finding the Third Proportional to 136,422 and 279,404

Step by Step Solution

1. Step 1: Write the proportion equation
   136,422 : 279,404 = 279,404 : x
2. Step 2: Convert to fraction form
   136,422/279,404 = 279,404/x
3. Step 3: Cross multiply
   136,422x = 279,404 × 279,404
4. Step 4: Simplify right side
   136,422x = 78,066,595,216
5. Step 5: Solve for x
   x = 78,066,595,216/136,422
6. Step 6: Final answer
   x = 572,243.44