Finding the Fourth Proportional to 91.49, 137.17 and 40.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91.49 : 137.17 = 40.10 : x
2. Step 2: Convert to fraction form
   91.49/137.17 = 40.10/x
3. Step 3: Cross multiply
   91.49x = 137.17 × 40.10
4. Step 4: Simplify right side
   91.49x = 5,499.63
5. Step 5: Solve for x
   x = 5,499.63/91.49
6. Step 6: Final answer
   x = 60.11