Finding the Fourth Proportional to 91.61, 137.49 and 43.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91.61 : 137.49 = 43.52 : x
2. Step 2: Convert to fraction form
   91.61/137.49 = 43.52/x
3. Step 3: Cross multiply
   91.61x = 137.49 × 43.52
4. Step 4: Simplify right side
   91.61x = 5,983.56
5. Step 5: Solve for x
   x = 5,983.56/91.61
6. Step 6: Final answer
   x = 65.32