Finding the Fourth Proportional to 72.84, 100.74 and 69.63

Step by Step Solution

1. Step 1: Write the proportion equation
   72.84 : 100.74 = 69.63 : x
2. Step 2: Convert to fraction form
   72.84/100.74 = 69.63/x
3. Step 3: Cross multiply
   72.84x = 100.74 × 69.63
4. Step 4: Simplify right side
   72.84x = 7,014.53
5. Step 5: Solve for x
   x = 7,014.53/72.84
6. Step 6: Final answer
   x = 96.30