Finding the Fourth Proportional to 78.53, 108.32 and 55.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78.53 : 108.32 = 55.25 : x
2. Step 2: Convert to fraction form
   78.53/108.32 = 55.25/x
3. Step 3: Cross multiply
   78.53x = 108.32 × 55.25
4. Step 4: Simplify right side
   78.53x = 5,983.86
5. Step 5: Solve for x
   x = 5,983.86/78.53
6. Step 6: Final answer
   x = 76.20