Finding the Third Proportional to 79,578 and 108,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,578 : 108,139.50 = 108,139.50 : x
2. Step 2: Convert to fraction form
   79,578/108,139.50 = 108,139.50/x
3. Step 3: Cross multiply
   79,578x = 108,139.50 × 108,139.50
4. Step 4: Simplify right side
   79,578x = 11,694,151,460.25
5. Step 5: Solve for x
   x = 11,694,151,460.25/79,578
6. Step 6: Final answer
   x = 146,952.07