Finding the Fourth Proportional to 72,812.28, 109,170.18 and 28,443.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,812.28 : 109,170.18 = 28,443.24 : x
2. Step 2: Convert to fraction form
   72,812.28/109,170.18 = 28,443.24/x
3. Step 3: Cross multiply
   72,812.28x = 109,170.18 × 28,443.24
4. Step 4: Simplify right side
   72,812.28x = 3,105,153,630.58
5. Step 5: Solve for x
   x = 3,105,153,630.58/72,812.28
6. Step 6: Final answer
   x = 42,646.02