Finding the Fourth Proportional to 15,538.42, 21,442.89 and 8,464.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,538.42 : 21,442.89 = 8,464.69 : x
2. Step 2: Convert to fraction form
   15,538.42/21,442.89 = 8,464.69/x
3. Step 3: Cross multiply
   15,538.42x = 21,442.89 × 8,464.69
4. Step 4: Simplify right side
   15,538.42x = 181,507,416.55
5. Step 5: Solve for x
   x = 181,507,416.55/15,538.42
6. Step 6: Final answer
   x = 11,681.20