Finding the Fourth Proportional to 82.38, 123.71 and 73.90

Step by Step Solution

1. Step 1: Write the proportion equation
   82.38 : 123.71 = 73.90 : x
2. Step 2: Convert to fraction form
   82.38/123.71 = 73.90/x
3. Step 3: Cross multiply
   82.38x = 123.71 × 73.90
4. Step 4: Simplify right side
   82.38x = 9,142.17
5. Step 5: Solve for x
   x = 9,142.17/82.38
6. Step 6: Final answer
   x = 110.98