Finding the Third Proportional to 72,621 and 106,987.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,621 : 106,987.50 = 106,987.50 : x
2. Step 2: Convert to fraction form
   72,621/106,987.50 = 106,987.50/x
3. Step 3: Cross multiply
   72,621x = 106,987.50 × 106,987.50
4. Step 4: Simplify right side
   72,621x = 11,446,325,156.25
5. Step 5: Solve for x
   x = 11,446,325,156.25/72,621
6. Step 6: Final answer
   x = 157,617.29