Finding the Fourth Proportional to 109.89, 151.69 and 73.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109.89 : 151.69 = 73.10 : x
2. Step 2: Convert to fraction form
   109.89/151.69 = 73.10/x
3. Step 3: Cross multiply
   109.89x = 151.69 × 73.10
4. Step 4: Simplify right side
   109.89x = 11,088.17
5. Step 5: Solve for x
   x = 11,088.17/109.89
6. Step 6: Final answer
   x = 100.91