Finding the Third Proportional to 136,297.69 and 279,389.25

Step by Step Solution

1. Step 1: Write the proportion equation
   136,297.69 : 279,389.25 = 279,389.25 : x
2. Step 2: Convert to fraction form
   136,297.69/279,389.25 = 279,389.25/x
3. Step 3: Cross multiply
   136,297.69x = 279,389.25 × 279,389.25
4. Step 4: Simplify right side
   136,297.69x = 78,058,353,015.56
5. Step 5: Solve for x
   x = 78,058,353,015.56/136,297.69
6. Step 6: Final answer
   x = 572,704.90