Finding the Third Proportional to 126,815.63 and 294,865.31

Step by Step Solution

1. Step 1: Write the proportion equation
   126,815.63 : 294,865.31 = 294,865.31 : x
2. Step 2: Convert to fraction form
   126,815.63/294,865.31 = 294,865.31/x
3. Step 3: Cross multiply
   126,815.63x = 294,865.31 × 294,865.31
4. Step 4: Simplify right side
   126,815.63x = 86,945,552,515.72
5. Step 5: Solve for x
   x = 86,945,552,515.72/126,815.63
6. Step 6: Final answer
   x = 685,605.99