Finding the Third Proportional to 79,111.50 and 105,678.75

Step by Step Solution

1. Step 1: Write the proportion equation
   79,111.50 : 105,678.75 = 105,678.75 : x
2. Step 2: Convert to fraction form
   79,111.50/105,678.75 = 105,678.75/x
3. Step 3: Cross multiply
   79,111.50x = 105,678.75 × 105,678.75
4. Step 4: Simplify right side
   79,111.50x = 11,167,998,201.56
5. Step 5: Solve for x
   x = 11,167,998,201.56/79,111.50
6. Step 6: Final answer
   x = 141,167.82