Finding the Fourth Proportional to 30,849.72, 42,554.70 and 20,792.04

Step by Step Solution

1. Step 1: Write the proportion equation
   30,849.72 : 42,554.70 = 20,792.04 : x
2. Step 2: Convert to fraction form
   30,849.72/42,554.70 = 20,792.04/x
3. Step 3: Cross multiply
   30,849.72x = 42,554.70 × 20,792.04
4. Step 4: Simplify right side
   30,849.72x = 884,799,024.59
5. Step 5: Solve for x
   x = 884,799,024.59/30,849.72
6. Step 6: Final answer
   x = 28,680.94