Finding the Fourth Proportional to 83.39, 124.50 and 74.69

Step by Step Solution

1. Step 1: Write the proportion equation
   83.39 : 124.50 = 74.69 : x
2. Step 2: Convert to fraction form
   83.39/124.50 = 74.69/x
3. Step 3: Cross multiply
   83.39x = 124.50 × 74.69
4. Step 4: Simplify right side
   83.39x = 9,298.53
5. Step 5: Solve for x
   x = 9,298.53/83.39
6. Step 6: Final answer
   x = 111.51