Finding the Third Proportional to 115,142.50 and 248,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   115,142.50 : 248,606.50 = 248,606.50 : x
2. Step 2: Convert to fraction form
   115,142.50/248,606.50 = 248,606.50/x
3. Step 3: Cross multiply
   115,142.50x = 248,606.50 × 248,606.50
4. Step 4: Simplify right side
   115,142.50x = 61,805,191,842.25
5. Step 5: Solve for x
   x = 61,805,191,842.25/115,142.50
6. Step 6: Final answer
   x = 536,771.32