Finding the Fourth Proportional to 76.02, 104.83 and 56.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76.02 : 104.83 = 56.31 : x
2. Step 2: Convert to fraction form
   76.02/104.83 = 56.31/x
3. Step 3: Cross multiply
   76.02x = 104.83 × 56.31
4. Step 4: Simplify right side
   76.02x = 5,902.98
5. Step 5: Solve for x
   x = 5,902.98/76.02
6. Step 6: Final answer
   x = 77.65