Finding the Fourth Proportional to 89.63, 134.36 and 43.91

Step by Step Solution

1. Step 1: Write the proportion equation
   89.63 : 134.36 = 43.91 : x
2. Step 2: Convert to fraction form
   89.63/134.36 = 43.91/x
3. Step 3: Cross multiply
   89.63x = 134.36 × 43.91
4. Step 4: Simplify right side
   89.63x = 5,898.86
5. Step 5: Solve for x
   x = 5,898.86/89.63
6. Step 6: Final answer
   x = 65.82