Finding the Fourth Proportional to 82.37, 123.59 and 30.99

Step by Step Solution

1. Step 1: Write the proportion equation
   82.37 : 123.59 = 30.99 : x
2. Step 2: Convert to fraction form
   82.37/123.59 = 30.99/x
3. Step 3: Cross multiply
   82.37x = 123.59 × 30.99
4. Step 4: Simplify right side
   82.37x = 3,830.60
5. Step 5: Solve for x
   x = 3,830.60/82.37
6. Step 6: Final answer
   x = 46.50