Finding the Fourth Proportional to 71.32, 106.89 and 53.32

Step by Step Solution

1. Step 1: Write the proportion equation
   71.32 : 106.89 = 53.32 : x
2. Step 2: Convert to fraction form
   71.32/106.89 = 53.32/x
3. Step 3: Cross multiply
   71.32x = 106.89 × 53.32
4. Step 4: Simplify right side
   71.32x = 5,699.37
5. Step 5: Solve for x
   x = 5,699.37/71.32
6. Step 6: Final answer
   x = 79.91