Finding the Fourth Proportional to 72,821.28, 109,274.38 and 30,698.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,821.28 : 109,274.38 = 30,698.79 : x
2. Step 2: Convert to fraction form
   72,821.28/109,274.38 = 30,698.79/x
3. Step 3: Cross multiply
   72,821.28x = 109,274.38 × 30,698.79
4. Step 4: Simplify right side
   72,821.28x = 3,354,591,244.00
5. Step 5: Solve for x
   x = 3,354,591,244.00/72,821.28
6. Step 6: Final answer
   x = 46,066.08