Finding the Third Proportional to 179.30 and 392.72

Step by Step Solution

1. Step 1: Write the proportion equation
   179.30 : 392.72 = 392.72 : x
2. Step 2: Convert to fraction form
   179.30/392.72 = 392.72/x
3. Step 3: Cross multiply
   179.30x = 392.72 × 392.72
4. Step 4: Simplify right side
   179.30x = 154,228.02
5. Step 5: Solve for x
   x = 154,228.02/179.30
6. Step 6: Final answer
   x = 860.18