Finding the Fourth Proportional to 86.72, 130.01 and 43.34

Step by Step Solution

1. Step 1: Write the proportion equation
   86.72 : 130.01 = 43.34 : x
2. Step 2: Convert to fraction form
   86.72/130.01 = 43.34/x
3. Step 3: Cross multiply
   86.72x = 130.01 × 43.34
4. Step 4: Simplify right side
   86.72x = 5,634.34
5. Step 5: Solve for x
   x = 5,634.34/86.72
6. Step 6: Final answer
   x = 64.97