Finding the Fourth Proportional to 8,540.90, 11,786.42 and 5,003.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,540.90 : 11,786.42 = 5,003.40 : x
2. Step 2: Convert to fraction form
   8,540.90/11,786.42 = 5,003.40/x
3. Step 3: Cross multiply
   8,540.90x = 11,786.42 × 5,003.40
4. Step 4: Simplify right side
   8,540.90x = 58,972,173.83
5. Step 5: Solve for x
   x = 58,972,173.83/8,540.90
6. Step 6: Final answer
   x = 6,904.68