Finding the Fourth Proportional to 72,821.69, 109,187.28 and 30,680.06

Step by Step Solution

1. Step 1: Write the proportion equation
   72,821.69 : 109,187.28 = 30,680.06 : x
2. Step 2: Convert to fraction form
   72,821.69/109,187.28 = 30,680.06/x
3. Step 3: Cross multiply
   72,821.69x = 109,187.28 × 30,680.06
4. Step 4: Simplify right side
   72,821.69x = 3,349,872,301.64
5. Step 5: Solve for x
   x = 3,349,872,301.64/72,821.69
6. Step 6: Final answer
   x = 46,001.02