Finding the Third Proportional to 53,018.50 and 81,988

Step by Step Solution

1. Step 1: Write the proportion equation
   53,018.50 : 81,988 = 81,988 : x
2. Step 2: Convert to fraction form
   53,018.50/81,988 = 81,988/x
3. Step 3: Cross multiply
   53,018.50x = 81,988 × 81,988
4. Step 4: Simplify right side
   53,018.50x = 6,722,032,144
5. Step 5: Solve for x
   x = 6,722,032,144/53,018.50
6. Step 6: Final answer
   x = 126,786.54