Finding the Fourth Proportional to 72.99, 100.41 and 72.51

Step by Step Solution

1. Step 1: Write the proportion equation
   72.99 : 100.41 = 72.51 : x
2. Step 2: Convert to fraction form
   72.99/100.41 = 72.51/x
3. Step 3: Cross multiply
   72.99x = 100.41 × 72.51
4. Step 4: Simplify right side
   72.99x = 7,280.73
5. Step 5: Solve for x
   x = 7,280.73/72.99
6. Step 6: Final answer
   x = 99.75