Finding the Fourth Proportional to 109.34, 151.03 and 91.15

Step by Step Solution

1. Step 1: Write the proportion equation
   109.34 : 151.03 = 91.15 : x
2. Step 2: Convert to fraction form
   109.34/151.03 = 91.15/x
3. Step 3: Cross multiply
   109.34x = 151.03 × 91.15
4. Step 4: Simplify right side
   109.34x = 13,766.38
5. Step 5: Solve for x
   x = 13,766.38/109.34
6. Step 6: Final answer
   x = 125.90