Finding the Third Proportional to 111,880.50 and 168,900

Step by Step Solution

1. Step 1: Write the proportion equation
   111,880.50 : 168,900 = 168,900 : x
2. Step 2: Convert to fraction form
   111,880.50/168,900 = 168,900/x
3. Step 3: Cross multiply
   111,880.50x = 168,900 × 168,900
4. Step 4: Simplify right side
   111,880.50x = 28,527,210,000
5. Step 5: Solve for x
   x = 28,527,210,000/111,880.50
6. Step 6: Final answer
   x = 254,979.29