Finding the Third Proportional to 81,905.50 and 123,435

Step by Step Solution

1. Step 1: Write the proportion equation
   81,905.50 : 123,435 = 123,435 : x
2. Step 2: Convert to fraction form
   81,905.50/123,435 = 123,435/x
3. Step 3: Cross multiply
   81,905.50x = 123,435 × 123,435
4. Step 4: Simplify right side
   81,905.50x = 15,236,199,225
5. Step 5: Solve for x
   x = 15,236,199,225/81,905.50
6. Step 6: Final answer
   x = 186,021.69