Finding the Fourth Proportional to 72.29, 99.81 and 53.95

Step by Step Solution

1. Step 1: Write the proportion equation
   72.29 : 99.81 = 53.95 : x
2. Step 2: Convert to fraction form
   72.29/99.81 = 53.95/x
3. Step 3: Cross multiply
   72.29x = 99.81 × 53.95
4. Step 4: Simplify right side
   72.29x = 5,384.25
5. Step 5: Solve for x
   x = 5,384.25/72.29
6. Step 6: Final answer
   x = 74.49