Finding the Fourth Proportional to 83.30, 124.82 and 57.53

Step by Step Solution

1. Step 1: Write the proportion equation
   83.30 : 124.82 = 57.53 : x
2. Step 2: Convert to fraction form
   83.30/124.82 = 57.53/x
3. Step 3: Cross multiply
   83.30x = 124.82 × 57.53
4. Step 4: Simplify right side
   83.30x = 7,180.89
5. Step 5: Solve for x
   x = 7,180.89/83.30
6. Step 6: Final answer
   x = 86.21