Finding the Fourth Proportional to 8,540.27, 12,802.58 and 2,990.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,540.27 : 12,802.58 = 2,990.59 : x
2. Step 2: Convert to fraction form
   8,540.27/12,802.58 = 2,990.59/x
3. Step 3: Cross multiply
   8,540.27x = 12,802.58 × 2,990.59
4. Step 4: Simplify right side
   8,540.27x = 38,287,267.72
5. Step 5: Solve for x
   x = 38,287,267.72/8,540.27
6. Step 6: Final answer
   x = 4,483.14