Finding the Third Proportional to 72,031 and 109,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,031 : 109,039.50 = 109,039.50 : x
2. Step 2: Convert to fraction form
   72,031/109,039.50 = 109,039.50/x
3. Step 3: Cross multiply
   72,031x = 109,039.50 × 109,039.50
4. Step 4: Simplify right side
   72,031x = 11,889,612,560.25
5. Step 5: Solve for x
   x = 11,889,612,560.25/72,031
6. Step 6: Final answer
   x = 165,062.44