Finding the Fourth Proportional to 16,591.25, 22,895.93 and 9,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,591.25 : 22,895.93 = 9,139.25 : x
2. Step 2: Convert to fraction form
   16,591.25/22,895.93 = 9,139.25/x
3. Step 3: Cross multiply
   16,591.25x = 22,895.93 × 9,139.25
4. Step 4: Simplify right side
   16,591.25x = 209,251,628.25
5. Step 5: Solve for x
   x = 209,251,628.25/16,591.25
6. Step 6: Final answer
   x = 12,612.17