Finding the Third Proportional to 81,899 and 123,426

Step by Step Solution

1. Step 1: Write the proportion equation
   81,899 : 123,426 = 123,426 : x
2. Step 2: Convert to fraction form
   81,899/123,426 = 123,426/x
3. Step 3: Cross multiply
   81,899x = 123,426 × 123,426
4. Step 4: Simplify right side
   81,899x = 15,233,977,476
5. Step 5: Solve for x
   x = 15,233,977,476/81,899
6. Step 6: Final answer
   x = 186,009.32