Finding the Fourth Proportional to 83.43, 124.98 and 40.05

Step by Step Solution

1. Step 1: Write the proportion equation
   83.43 : 124.98 = 40.05 : x
2. Step 2: Convert to fraction form
   83.43/124.98 = 40.05/x
3. Step 3: Cross multiply
   83.43x = 124.98 × 40.05
4. Step 4: Simplify right side
   83.43x = 5,005.45
5. Step 5: Solve for x
   x = 5,005.45/83.43
6. Step 6: Final answer
   x = 60.00