Finding the Third Proportional to 111,939 and 155,148

Step by Step Solution

1. Step 1: Write the proportion equation
   111,939 : 155,148 = 155,148 : x
2. Step 2: Convert to fraction form
   111,939/155,148 = 155,148/x
3. Step 3: Cross multiply
   111,939x = 155,148 × 155,148
4. Step 4: Simplify right side
   111,939x = 24,070,901,904
5. Step 5: Solve for x
   x = 24,070,901,904/111,939
6. Step 6: Final answer
   x = 215,035.88