Finding the Fourth Proportional to 83.32, 124.91 and 42.77

Step by Step Solution

1. Step 1: Write the proportion equation
   83.32 : 124.91 = 42.77 : x
2. Step 2: Convert to fraction form
   83.32/124.91 = 42.77/x
3. Step 3: Cross multiply
   83.32x = 124.91 × 42.77
4. Step 4: Simplify right side
   83.32x = 5,342.40
5. Step 5: Solve for x
   x = 5,342.40/83.32
6. Step 6: Final answer
   x = 64.12