Finding the Fourth Proportional to 164.72, 247.06 and 83.50

Step by Step Solution

1. Step 1: Write the proportion equation
   164.72 : 247.06 = 83.50 : x
2. Step 2: Convert to fraction form
   164.72/247.06 = 83.50/x
3. Step 3: Cross multiply
   164.72x = 247.06 × 83.50
4. Step 4: Simplify right side
   164.72x = 20,627.86
5. Step 5: Solve for x
   x = 20,627.86/164.72
6. Step 6: Final answer
   x = 125.23