Finding the Fourth Proportional to 14,322.24, 21,464.56 and 10,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,322.24 : 21,464.56 = 10,386.72 : x
2. Step 2: Convert to fraction form
   14,322.24/21,464.56 = 10,386.72/x
3. Step 3: Cross multiply
   14,322.24x = 21,464.56 × 10,386.72
4. Step 4: Simplify right side
   14,322.24x = 222,946,374.64
5. Step 5: Solve for x
   x = 222,946,374.64/14,322.24
6. Step 6: Final answer
   x = 15,566.45