Finding the Fourth Proportional to 83.06, 124.67 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   83.06 : 124.67 = 42.50 : x
2. Step 2: Convert to fraction form
   83.06/124.67 = 42.50/x
3. Step 3: Cross multiply
   83.06x = 124.67 × 42.50
4. Step 4: Simplify right side
   83.06x = 5,298.48
5. Step 5: Solve for x
   x = 5,298.48/83.06
6. Step 6: Final answer
   x = 63.79