Finding the Fourth Proportional to 94.72, 130.72 and 57.89

Step by Step Solution

1. Step 1: Write the proportion equation
   94.72 : 130.72 = 57.89 : x
2. Step 2: Convert to fraction form
   94.72/130.72 = 57.89/x
3. Step 3: Cross multiply
   94.72x = 130.72 × 57.89
4. Step 4: Simplify right side
   94.72x = 7,567.56
5. Step 5: Solve for x
   x = 7,567.56/94.72
6. Step 6: Final answer
   x = 79.90