Finding the Fourth Proportional to 82.47, 123.72 and 46.38

Step by Step Solution

1. Step 1: Write the proportion equation
   82.47 : 123.72 = 46.38 : x
2. Step 2: Convert to fraction form
   82.47/123.72 = 46.38/x
3. Step 3: Cross multiply
   82.47x = 123.72 × 46.38
4. Step 4: Simplify right side
   82.47x = 5,738.13
5. Step 5: Solve for x
   x = 5,738.13/82.47
6. Step 6: Final answer
   x = 69.58