Finding the Fourth Proportional to 71.69, 98.87 and 53.30

Step by Step Solution

1. Step 1: Write the proportion equation
   71.69 : 98.87 = 53.30 : x
2. Step 2: Convert to fraction form
   71.69/98.87 = 53.30/x
3. Step 3: Cross multiply
   71.69x = 98.87 × 53.30
4. Step 4: Simplify right side
   71.69x = 5,269.01
5. Step 5: Solve for x
   x = 5,269.01/71.69
6. Step 6: Final answer
   x = 73.50