Finding the Fourth Proportional to 13,404.63, 18,499.31 and 7,436.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.63 : 18,499.31 = 7,436.85 : x
2. Step 2: Convert to fraction form
   13,404.63/18,499.31 = 7,436.85/x
3. Step 3: Cross multiply
   13,404.63x = 18,499.31 × 7,436.85
4. Step 4: Simplify right side
   13,404.63x = 137,576,556.39
5. Step 5: Solve for x
   x = 137,576,556.39/13,404.63
6. Step 6: Final answer
   x = 10,263.36