Finding the Fourth Proportional to 82.72, 123.90 and 46.57

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 123.90 = 46.57 : x
2. Step 2: Convert to fraction form
   82.72/123.90 = 46.57/x
3. Step 3: Cross multiply
   82.72x = 123.90 × 46.57
4. Step 4: Simplify right side
   82.72x = 5,770.02
5. Step 5: Solve for x
   x = 5,770.02/82.72
6. Step 6: Final answer
   x = 69.75