Finding the Fourth Proportional to 8,426.86, 11,639.37 and 5,783.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,426.86 : 11,639.37 = 5,783.02 : x
2. Step 2: Convert to fraction form
   8,426.86/11,639.37 = 5,783.02/x
3. Step 3: Cross multiply
   8,426.86x = 11,639.37 × 5,783.02
4. Step 4: Simplify right side
   8,426.86x = 67,310,709.50
5. Step 5: Solve for x
   x = 67,310,709.50/8,426.86
6. Step 6: Final answer
   x = 7,987.64