Finding the Fourth Proportional to 15,462.42, 21,338.28 and 8,388.98

Step by Step Solution

1. Step 1: Write the proportion equation
   15,462.42 : 21,338.28 = 8,388.98 : x
2. Step 2: Convert to fraction form
   15,462.42/21,338.28 = 8,388.98/x
3. Step 3: Cross multiply
   15,462.42x = 21,338.28 × 8,388.98
4. Step 4: Simplify right side
   15,462.42x = 179,006,404.15
5. Step 5: Solve for x
   x = 179,006,404.15/15,462.42
6. Step 6: Final answer
   x = 11,576.87