Finding the Fourth Proportional to 83.00, 124.49 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   83.00 : 124.49 = 42.30 : x
2. Step 2: Convert to fraction form
   83.00/124.49 = 42.30/x
3. Step 3: Cross multiply
   83.00x = 124.49 × 42.30
4. Step 4: Simplify right side
   83.00x = 5,266.03
5. Step 5: Solve for x
   x = 5,266.03/83.00
6. Step 6: Final answer
   x = 63.44