Finding the Fourth Proportional to 52.42, 71.72 and 51.34

Step by Step Solution

1. Step 1: Write the proportion equation
   52.42 : 71.72 = 51.34 : x
2. Step 2: Convert to fraction form
   52.42/71.72 = 51.34/x
3. Step 3: Cross multiply
   52.42x = 71.72 × 51.34
4. Step 4: Simplify right side
   52.42x = 3,682.10
5. Step 5: Solve for x
   x = 3,682.10/52.42
6. Step 6: Final answer
   x = 70.24