Finding the Third Proportional to 298.69 and 407.53

Step by Step Solution

1. Step 1: Write the proportion equation
   298.69 : 407.53 = 407.53 : x
2. Step 2: Convert to fraction form
   298.69/407.53 = 407.53/x
3. Step 3: Cross multiply
   298.69x = 407.53 × 407.53
4. Step 4: Simplify right side
   298.69x = 166,081.72
5. Step 5: Solve for x
   x = 166,081.72/298.69
6. Step 6: Final answer
   x = 556.04