Finding the Fourth Proportional to 52.12, 78.18 and 34.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52.12 : 78.18 = 34.12 : x
2. Step 2: Convert to fraction form
   52.12/78.18 = 34.12/x
3. Step 3: Cross multiply
   52.12x = 78.18 × 34.12
4. Step 4: Simplify right side
   52.12x = 2,667.50
5. Step 5: Solve for x
   x = 2,667.50/52.12
6. Step 6: Final answer
   x = 51.18