Finding the Fourth Proportional to 72.84, 100.55 and 43.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72.84 : 100.55 = 43.76 : x
2. Step 2: Convert to fraction form
   72.84/100.55 = 43.76/x
3. Step 3: Cross multiply
   72.84x = 100.55 × 43.76
4. Step 4: Simplify right side
   72.84x = 4,399.35
5. Step 5: Solve for x
   x = 4,399.35/72.84
6. Step 6: Final answer
   x = 60.40