Finding the Fourth Proportional to 74.88, 103.50 and 56.52

Step by Step Solution

1. Step 1: Write the proportion equation
   74.88 : 103.50 = 56.52 : x
2. Step 2: Convert to fraction form
   74.88/103.50 = 56.52/x
3. Step 3: Cross multiply
   74.88x = 103.50 × 56.52
4. Step 4: Simplify right side
   74.88x = 5,849.82
5. Step 5: Solve for x
   x = 5,849.82/74.88
6. Step 6: Final answer
   x = 78.12