Finding the Third Proportional to 91,012 and 137,790

Step by Step Solution

1. Step 1: Write the proportion equation
   91,012 : 137,790 = 137,790 : x
2. Step 2: Convert to fraction form
   91,012/137,790 = 137,790/x
3. Step 3: Cross multiply
   91,012x = 137,790 × 137,790
4. Step 4: Simplify right side
   91,012x = 18,986,084,100
5. Step 5: Solve for x
   x = 18,986,084,100/91,012
6. Step 6: Final answer
   x = 208,610.78