Finding the Fourth Proportional to 90.18, 123.73 and 88.14

Step by Step Solution

1. Step 1: Write the proportion equation
   90.18 : 123.73 = 88.14 : x
2. Step 2: Convert to fraction form
   90.18/123.73 = 88.14/x
3. Step 3: Cross multiply
   90.18x = 123.73 × 88.14
4. Step 4: Simplify right side
   90.18x = 10,905.56
5. Step 5: Solve for x
   x = 10,905.56/90.18
6. Step 6: Final answer
   x = 120.93