Finding the Fourth Proportional to 109.89, 151.74 and 89.37

Step by Step Solution

1. Step 1: Write the proportion equation
   109.89 : 151.74 = 89.37 : x
2. Step 2: Convert to fraction form
   109.89/151.74 = 89.37/x
3. Step 3: Cross multiply
   109.89x = 151.74 × 89.37
4. Step 4: Simplify right side
   109.89x = 13,561.00
5. Step 5: Solve for x
   x = 13,561.00/109.89
6. Step 6: Final answer
   x = 123.41