Finding the Third Proportional to 81,903.50 and 123,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,903.50 : 123,431.50 = 123,431.50 : x
2. Step 2: Convert to fraction form
   81,903.50/123,431.50 = 123,431.50/x
3. Step 3: Cross multiply
   81,903.50x = 123,431.50 × 123,431.50
4. Step 4: Simplify right side
   81,903.50x = 15,235,335,192.25
5. Step 5: Solve for x
   x = 15,235,335,192.25/81,903.50
6. Step 6: Final answer
   x = 186,015.68