Finding the Fourth Proportional to 72.47, 108.63 and 53.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72.47 : 108.63 = 53.10 : x
2. Step 2: Convert to fraction form
   72.47/108.63 = 53.10/x
3. Step 3: Cross multiply
   72.47x = 108.63 × 53.10
4. Step 4: Simplify right side
   72.47x = 5,768.25
5. Step 5: Solve for x
   x = 5,768.25/72.47
6. Step 6: Final answer
   x = 79.59