Finding the Fourth Proportional to 16,002.60, 22,086.18 and 9,718.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,002.60 : 22,086.18 = 9,718.20 : x
2. Step 2: Convert to fraction form
   16,002.60/22,086.18 = 9,718.20/x
3. Step 3: Cross multiply
   16,002.60x = 22,086.18 × 9,718.20
4. Step 4: Simplify right side
   16,002.60x = 214,637,914.48
5. Step 5: Solve for x
   x = 214,637,914.48/16,002.60
6. Step 6: Final answer
   x = 13,412.69