Finding the Fourth Proportional to 82.78, 114.38 and 69.47

Step by Step Solution

1. Step 1: Write the proportion equation
   82.78 : 114.38 = 69.47 : x
2. Step 2: Convert to fraction form
   82.78/114.38 = 69.47/x
3. Step 3: Cross multiply
   82.78x = 114.38 × 69.47
4. Step 4: Simplify right side
   82.78x = 7,945.98
5. Step 5: Solve for x
   x = 7,945.98/82.78
6. Step 6: Final answer
   x = 95.99