Finding the Third Proportional to 79,876 and 105,990

Step by Step Solution

1. Step 1: Write the proportion equation
   79,876 : 105,990 = 105,990 : x
2. Step 2: Convert to fraction form
   79,876/105,990 = 105,990/x
3. Step 3: Cross multiply
   79,876x = 105,990 × 105,990
4. Step 4: Simplify right side
   79,876x = 11,233,880,100
5. Step 5: Solve for x
   x = 11,233,880,100/79,876
6. Step 6: Final answer
   x = 140,641.50