Finding the Fourth Proportional to 86.72, 130.04 and 35.34

Step by Step Solution

1. Step 1: Write the proportion equation
   86.72 : 130.04 = 35.34 : x
2. Step 2: Convert to fraction form
   86.72/130.04 = 35.34/x
3. Step 3: Cross multiply
   86.72x = 130.04 × 35.34
4. Step 4: Simplify right side
   86.72x = 4,595.61
5. Step 5: Solve for x
   x = 4,595.61/86.72
6. Step 6: Final answer
   x = 52.99