Finding the Fourth Proportional to 82.16, 123.06 and 58.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82.16 : 123.06 = 58.10 : x
2. Step 2: Convert to fraction form
   82.16/123.06 = 58.10/x
3. Step 3: Cross multiply
   82.16x = 123.06 × 58.10
4. Step 4: Simplify right side
   82.16x = 7,149.79
5. Step 5: Solve for x
   x = 7,149.79/82.16
6. Step 6: Final answer
   x = 87.02