Finding the Third Proportional to 78,939 and 111,175

Step by Step Solution

1. Step 1: Write the proportion equation
   78,939 : 111,175 = 111,175 : x
2. Step 2: Convert to fraction form
   78,939/111,175 = 111,175/x
3. Step 3: Cross multiply
   78,939x = 111,175 × 111,175
4. Step 4: Simplify right side
   78,939x = 12,359,880,625
5. Step 5: Solve for x
   x = 12,359,880,625/78,939
6. Step 6: Final answer
   x = 156,575.08