Finding the Third Proportional to 126,298.50 and 278,947

Step by Step Solution

1. Step 1: Write the proportion equation
   126,298.50 : 278,947 = 278,947 : x
2. Step 2: Convert to fraction form
   126,298.50/278,947 = 278,947/x
3. Step 3: Cross multiply
   126,298.50x = 278,947 × 278,947
4. Step 4: Simplify right side
   126,298.50x = 77,811,428,809
5. Step 5: Solve for x
   x = 77,811,428,809/126,298.50
6. Step 6: Final answer
   x = 616,091.47