Finding the Fourth Proportional to 72.88, 100.62 and 53.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72.88 : 100.62 = 53.56 : x
2. Step 2: Convert to fraction form
   72.88/100.62 = 53.56/x
3. Step 3: Cross multiply
   72.88x = 100.62 × 53.56
4. Step 4: Simplify right side
   72.88x = 5,389.21
5. Step 5: Solve for x
   x = 5,389.21/72.88
6. Step 6: Final answer
   x = 73.95