Finding the Third Proportional to 72,312 and 109,488

Step by Step Solution

1. Step 1: Write the proportion equation
   72,312 : 109,488 = 109,488 : x
2. Step 2: Convert to fraction form
   72,312/109,488 = 109,488/x
3. Step 3: Cross multiply
   72,312x = 109,488 × 109,488
4. Step 4: Simplify right side
   72,312x = 11,987,622,144
5. Step 5: Solve for x
   x = 11,987,622,144/72,312
6. Step 6: Final answer
   x = 165,776.39