Finding the Third Proportional to 72,699.50 and 106,649.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,699.50 : 106,649.25 = 106,649.25 : x
2. Step 2: Convert to fraction form
   72,699.50/106,649.25 = 106,649.25/x
3. Step 3: Cross multiply
   72,699.50x = 106,649.25 × 106,649.25
4. Step 4: Simplify right side
   72,699.50x = 11,374,062,525.56
5. Step 5: Solve for x
   x = 11,374,062,525.56/72,699.50
6. Step 6: Final answer
   x = 156,453.11