Finding the Fourth Proportional to 12,404.55, 18,608.64 and 3,638.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.55 : 18,608.64 = 3,638.31 : x
2. Step 2: Convert to fraction form
   12,404.55/18,608.64 = 3,638.31/x
3. Step 3: Cross multiply
   12,404.55x = 18,608.64 × 3,638.31
4. Step 4: Simplify right side
   12,404.55x = 67,704,001.00
5. Step 5: Solve for x
   x = 67,704,001.00/12,404.55
6. Step 6: Final answer
   x = 5,458.00