Finding the Fourth Proportional to 91.98, 137.78 and 43.27

Step by Step Solution

1. Step 1: Write the proportion equation
   91.98 : 137.78 = 43.27 : x
2. Step 2: Convert to fraction form
   91.98/137.78 = 43.27/x
3. Step 3: Cross multiply
   91.98x = 137.78 × 43.27
4. Step 4: Simplify right side
   91.98x = 5,962.20
5. Step 5: Solve for x
   x = 5,962.20/91.98
6. Step 6: Final answer
   x = 64.82