Finding the Third Proportional to 37,290 and 72,687

Step by Step Solution

1. Step 1: Write the proportion equation
   37,290 : 72,687 = 72,687 : x
2. Step 2: Convert to fraction form
   37,290/72,687 = 72,687/x
3. Step 3: Cross multiply
   37,290x = 72,687 × 72,687
4. Step 4: Simplify right side
   37,290x = 5,283,399,969
5. Step 5: Solve for x
   x = 5,283,399,969/37,290
6. Step 6: Final answer
   x = 141,684.10