Finding the Fourth Proportional to 72.88, 100.58 and 53.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72.88 : 100.58 = 53.48 : x
2. Step 2: Convert to fraction form
   72.88/100.58 = 53.48/x
3. Step 3: Cross multiply
   72.88x = 100.58 × 53.48
4. Step 4: Simplify right side
   72.88x = 5,379.02
5. Step 5: Solve for x
   x = 5,379.02/72.88
6. Step 6: Final answer
   x = 73.81