Finding the Fourth Proportional to 82.30, 123.42 and 34.19

Step by Step Solution

1. Step 1: Write the proportion equation
   82.30 : 123.42 = 34.19 : x
2. Step 2: Convert to fraction form
   82.30/123.42 = 34.19/x
3. Step 3: Cross multiply
   82.30x = 123.42 × 34.19
4. Step 4: Simplify right side
   82.30x = 4,219.73
5. Step 5: Solve for x
   x = 4,219.73/82.30
6. Step 6: Final answer
   x = 51.27