Finding the Fourth Proportional to 16,899.15, 23,320.71 and 9,447.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,899.15 : 23,320.71 = 9,447.15 : x
2. Step 2: Convert to fraction form
   16,899.15/23,320.71 = 9,447.15/x
3. Step 3: Cross multiply
   16,899.15x = 23,320.71 × 9,447.15
4. Step 4: Simplify right side
   16,899.15x = 220,314,245.48
5. Step 5: Solve for x
   x = 220,314,245.48/16,899.15
6. Step 6: Final answer
   x = 13,037.00