Finding the Fourth Proportional to 127.98, 176.67 and 89.10

Step by Step Solution

1. Step 1: Write the proportion equation
   127.98 : 176.67 = 89.10 : x
2. Step 2: Convert to fraction form
   127.98/176.67 = 89.10/x
3. Step 3: Cross multiply
   127.98x = 176.67 × 89.10
4. Step 4: Simplify right side
   127.98x = 15,741.30
5. Step 5: Solve for x
   x = 15,741.30/127.98
6. Step 6: Final answer
   x = 123.00