Finding the Fourth Proportional to 8,784.78, 13,178.25 and 3,589.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.78 : 13,178.25 = 3,589.98 : x
2. Step 2: Convert to fraction form
   8,784.78/13,178.25 = 3,589.98/x
3. Step 3: Cross multiply
   8,784.78x = 13,178.25 × 3,589.98
4. Step 4: Simplify right side
   8,784.78x = 47,309,653.94
5. Step 5: Solve for x
   x = 47,309,653.94/8,784.78
6. Step 6: Final answer
   x = 5,385.41