Finding the Fourth Proportional to 72,274.58, 99,743.10 and 40,443.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,274.58 : 99,743.10 = 40,443.20 : x
2. Step 2: Convert to fraction form
   72,274.58/99,743.10 = 40,443.20/x
3. Step 3: Cross multiply
   72,274.58x = 99,743.10 × 40,443.20
4. Step 4: Simplify right side
   72,274.58x = 4,033,930,141.92
5. Step 5: Solve for x
   x = 4,033,930,141.92/72,274.58
6. Step 6: Final answer
   x = 55,813.95