Finding the Fourth Proportional to 52.84, 78.72 and 50.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52.84 : 78.72 = 50.78 : x
2. Step 2: Convert to fraction form
   52.84/78.72 = 50.78/x
3. Step 3: Cross multiply
   52.84x = 78.72 × 50.78
4. Step 4: Simplify right side
   52.84x = 3,997.40
5. Step 5: Solve for x
   x = 3,997.40/52.84
6. Step 6: Final answer
   x = 75.65