Finding the Fourth Proportional to 72.88, 109.35 and 43.99

Step by Step Solution

1. Step 1: Write the proportion equation
   72.88 : 109.35 = 43.99 : x
2. Step 2: Convert to fraction form
   72.88/109.35 = 43.99/x
3. Step 3: Cross multiply
   72.88x = 109.35 × 43.99
4. Step 4: Simplify right side
   72.88x = 4,810.03
5. Step 5: Solve for x
   x = 4,810.03/72.88
6. Step 6: Final answer
   x = 66.00