Finding the Fourth Proportional to 71.89, 107.32 and 65.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71.89 : 107.32 = 65.82 : x
2. Step 2: Convert to fraction form
   71.89/107.32 = 65.82/x
3. Step 3: Cross multiply
   71.89x = 107.32 × 65.82
4. Step 4: Simplify right side
   71.89x = 7,063.28
5. Step 5: Solve for x
   x = 7,063.28/71.89
6. Step 6: Final answer
   x = 98.25