Finding the Fourth Proportional to 91.71, 137.34 and 43.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91.71 : 137.34 = 43.50 : x
2. Step 2: Convert to fraction form
   91.71/137.34 = 43.50/x
3. Step 3: Cross multiply
   91.71x = 137.34 × 43.50
4. Step 4: Simplify right side
   91.71x = 5,974.29
5. Step 5: Solve for x
   x = 5,974.29/91.71
6. Step 6: Final answer
   x = 65.14