Finding the Fourth Proportional to 83.37, 124.99 and 42.77

Step by Step Solution

1. Step 1: Write the proportion equation
   83.37 : 124.99 = 42.77 : x
2. Step 2: Convert to fraction form
   83.37/124.99 = 42.77/x
3. Step 3: Cross multiply
   83.37x = 124.99 × 42.77
4. Step 4: Simplify right side
   83.37x = 5,345.82
5. Step 5: Solve for x
   x = 5,345.82/83.37
6. Step 6: Final answer
   x = 64.12