Finding the Third Proportional to 126,697.50 and 279,531

Step by Step Solution

1. Step 1: Write the proportion equation
   126,697.50 : 279,531 = 279,531 : x
2. Step 2: Convert to fraction form
   126,697.50/279,531 = 279,531/x
3. Step 3: Cross multiply
   126,697.50x = 279,531 × 279,531
4. Step 4: Simplify right side
   126,697.50x = 78,137,579,961
5. Step 5: Solve for x
   x = 78,137,579,961/126,697.50
6. Step 6: Final answer
   x = 616,725.51