Finding the Fourth Proportional to 72.05, 99.33 and 53.63

Step by Step Solution

1. Step 1: Write the proportion equation
   72.05 : 99.33 = 53.63 : x
2. Step 2: Convert to fraction form
   72.05/99.33 = 53.63/x
3. Step 3: Cross multiply
   72.05x = 99.33 × 53.63
4. Step 4: Simplify right side
   72.05x = 5,326.57
5. Step 5: Solve for x
   x = 5,326.57/72.05
6. Step 6: Final answer
   x = 73.93