Finding the Fourth Proportional to 83.50, 125.14 and 42.98

Step by Step Solution

1. Step 1: Write the proportion equation
   83.50 : 125.14 = 42.98 : x
2. Step 2: Convert to fraction form
   83.50/125.14 = 42.98/x
3. Step 3: Cross multiply
   83.50x = 125.14 × 42.98
4. Step 4: Simplify right side
   83.50x = 5,378.52
5. Step 5: Solve for x
   x = 5,378.52/83.50
6. Step 6: Final answer
   x = 64.41