Finding the Third Proportional to 111,928 and 155,131

Step by Step Solution

1. Step 1: Write the proportion equation
   111,928 : 155,131 = 155,131 : x
2. Step 2: Convert to fraction form
   111,928/155,131 = 155,131/x
3. Step 3: Cross multiply
   111,928x = 155,131 × 155,131
4. Step 4: Simplify right side
   111,928x = 24,065,627,161
5. Step 5: Solve for x
   x = 24,065,627,161/111,928
6. Step 6: Final answer
   x = 215,009.89