Finding the Fourth Proportional to 14,189.78, 19,581.72 and 7,816.22

Step by Step Solution

1. Step 1: Write the proportion equation
   14,189.78 : 19,581.72 = 7,816.22 : x
2. Step 2: Convert to fraction form
   14,189.78/19,581.72 = 7,816.22/x
3. Step 3: Cross multiply
   14,189.78x = 19,581.72 × 7,816.22
4. Step 4: Simplify right side
   14,189.78x = 153,055,031.50
5. Step 5: Solve for x
   x = 153,055,031.50/14,189.78
6. Step 6: Final answer
   x = 10,786.29