Finding the Fourth Proportional to 20,792.31, 31,190.42 and 5,800.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,792.31 : 31,190.42 = 5,800.42 : x
2. Step 2: Convert to fraction form
   20,792.31/31,190.42 = 5,800.42/x
3. Step 3: Cross multiply
   20,792.31x = 31,190.42 × 5,800.42
4. Step 4: Simplify right side
   20,792.31x = 180,917,597.62
5. Step 5: Solve for x
   x = 180,917,597.62/20,792.31
6. Step 6: Final answer
   x = 8,701.18