Finding the Fourth Proportional to 16,440.60, 22,686.67 and 9,172.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,440.60 : 22,686.67 = 9,172.25 : x
2. Step 2: Convert to fraction form
   16,440.60/22,686.67 = 9,172.25/x
3. Step 3: Cross multiply
   16,440.60x = 22,686.67 × 9,172.25
4. Step 4: Simplify right side
   16,440.60x = 208,087,868.03
5. Step 5: Solve for x
   x = 208,087,868.03/16,440.60
6. Step 6: Final answer
   x = 12,656.95