Finding the Fourth Proportional to 82.99, 124.27 and 60.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82.99 : 124.27 = 60.31 : x
2. Step 2: Convert to fraction form
   82.99/124.27 = 60.31/x
3. Step 3: Cross multiply
   82.99x = 124.27 × 60.31
4. Step 4: Simplify right side
   82.99x = 7,494.72
5. Step 5: Solve for x
   x = 7,494.72/82.99
6. Step 6: Final answer
   x = 90.31