Finding the Fourth Proportional to 82.34, 123.58 and 51.98

Step by Step Solution

1. Step 1: Write the proportion equation
   82.34 : 123.58 = 51.98 : x
2. Step 2: Convert to fraction form
   82.34/123.58 = 51.98/x
3. Step 3: Cross multiply
   82.34x = 123.58 × 51.98
4. Step 4: Simplify right side
   82.34x = 6,423.69
5. Step 5: Solve for x
   x = 6,423.69/82.34
6. Step 6: Final answer
   x = 78.01