Finding the Third Proportional to 100.13 and 166.88

Step by Step Solution

1. Step 1: Write the proportion equation
   100.13 : 166.88 = 166.88 : x
2. Step 2: Convert to fraction form
   100.13/166.88 = 166.88/x
3. Step 3: Cross multiply
   100.13x = 166.88 × 166.88
4. Step 4: Simplify right side
   100.13x = 27,847.27
5. Step 5: Solve for x
   x = 27,847.27/100.13
6. Step 6: Final answer
   x = 278.13