Finding the Fourth Proportional to 89.99, 123.82 and 83.49

Step by Step Solution

1. Step 1: Write the proportion equation
   89.99 : 123.82 = 83.49 : x
2. Step 2: Convert to fraction form
   89.99/123.82 = 83.49/x
3. Step 3: Cross multiply
   89.99x = 123.82 × 83.49
4. Step 4: Simplify right side
   89.99x = 10,337.81
5. Step 5: Solve for x
   x = 10,337.81/89.99
6. Step 6: Final answer
   x = 114.88