Finding the Fourth Proportional to 72.29, 99.69 and 53.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72.29 : 99.69 = 53.84 : x
2. Step 2: Convert to fraction form
   72.29/99.69 = 53.84/x
3. Step 3: Cross multiply
   72.29x = 99.69 × 53.84
4. Step 4: Simplify right side
   72.29x = 5,366.81
5. Step 5: Solve for x
   x = 5,366.81/72.29
6. Step 6: Final answer
   x = 74.25