Finding the Fourth Proportional to 91.32, 136.82 and 43.16

Step by Step Solution

1. Step 1: Write the proportion equation
   91.32 : 136.82 = 43.16 : x
2. Step 2: Convert to fraction form
   91.32/136.82 = 43.16/x
3. Step 3: Cross multiply
   91.32x = 136.82 × 43.16
4. Step 4: Simplify right side
   91.32x = 5,905.15
5. Step 5: Solve for x
   x = 5,905.15/91.32
6. Step 6: Final answer
   x = 64.66