Finding the Third Proportional to 72,290 and 108,507

Step by Step Solution

1. Step 1: Write the proportion equation
   72,290 : 108,507 = 108,507 : x
2. Step 2: Convert to fraction form
   72,290/108,507 = 108,507/x
3. Step 3: Cross multiply
   72,290x = 108,507 × 108,507
4. Step 4: Simplify right side
   72,290x = 11,773,769,049
5. Step 5: Solve for x
   x = 11,773,769,049/72,290
6. Step 6: Final answer
   x = 162,868.57