Finding the Third Proportional to 111,928.50 and 168,399

Step by Step Solution

1. Step 1: Write the proportion equation
   111,928.50 : 168,399 = 168,399 : x
2. Step 2: Convert to fraction form
   111,928.50/168,399 = 168,399/x
3. Step 3: Cross multiply
   111,928.50x = 168,399 × 168,399
4. Step 4: Simplify right side
   111,928.50x = 28,358,223,201
5. Step 5: Solve for x
   x = 28,358,223,201/111,928.50
6. Step 6: Final answer
   x = 253,360.16