Finding the Third Proportional to 126,810 and 299,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   126,810 : 299,891.50 = 299,891.50 : x
2. Step 2: Convert to fraction form
   126,810/299,891.50 = 299,891.50/x
3. Step 3: Cross multiply
   126,810x = 299,891.50 × 299,891.50
4. Step 4: Simplify right side
   126,810x = 89,934,911,772.25
5. Step 5: Solve for x
   x = 89,934,911,772.25/126,810
6. Step 6: Final answer
   x = 709,209.93