Finding the Fourth Proportional to 10,069.43, 13,899.54 and 8,647.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,069.43 : 13,899.54 = 8,647.40 : x
2. Step 2: Convert to fraction form
   10,069.43/13,899.54 = 8,647.40/x
3. Step 3: Cross multiply
   10,069.43x = 13,899.54 × 8,647.40
4. Step 4: Simplify right side
   10,069.43x = 120,194,933.52
5. Step 5: Solve for x
   x = 120,194,933.52/10,069.43
6. Step 6: Final answer
   x = 11,936.62