Finding the Fourth Proportional to 15,287.18, 21,100.04 and 9,322.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,287.18 : 21,100.04 = 9,322.12 : x
2. Step 2: Convert to fraction form
   15,287.18/21,100.04 = 9,322.12/x
3. Step 3: Cross multiply
   15,287.18x = 21,100.04 × 9,322.12
4. Step 4: Simplify right side
   15,287.18x = 196,697,104.88
5. Step 5: Solve for x
   x = 196,697,104.88/15,287.18
6. Step 6: Final answer
   x = 12,866.80