Finding the Fourth Proportional to 72.95, 100.72 and 58.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72.95 : 100.72 = 58.26 : x
2. Step 2: Convert to fraction form
   72.95/100.72 = 58.26/x
3. Step 3: Cross multiply
   72.95x = 100.72 × 58.26
4. Step 4: Simplify right side
   72.95x = 5,868.40
5. Step 5: Solve for x
   x = 5,868.40/72.95
6. Step 6: Final answer
   x = 80.45