Finding the Fourth Proportional to 72.86, 100.55 and 53.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72.86 : 100.55 = 53.44 : x
2. Step 2: Convert to fraction form
   72.86/100.55 = 53.44/x
3. Step 3: Cross multiply
   72.86x = 100.55 × 53.44
4. Step 4: Simplify right side
   72.86x = 5,373.27
5. Step 5: Solve for x
   x = 5,373.27/72.86
6. Step 6: Final answer
   x = 73.75