Finding the Fourth Proportional to 67.77, 100.71 and 65.61

Step by Step Solution

1. Step 1: Write the proportion equation
   67.77 : 100.71 = 65.61 : x
2. Step 2: Convert to fraction form
   67.77/100.71 = 65.61/x
3. Step 3: Cross multiply
   67.77x = 100.71 × 65.61
4. Step 4: Simplify right side
   67.77x = 6,607.58
5. Step 5: Solve for x
   x = 6,607.58/67.77
6. Step 6: Final answer
   x = 97.50