Finding the Fourth Proportional to 35,777.98, 53,676.52 and 12,404.40

Step by Step Solution

1. Step 1: Write the proportion equation
   35,777.98 : 53,676.52 = 12,404.40 : x
2. Step 2: Convert to fraction form
   35,777.98/53,676.52 = 12,404.40/x
3. Step 3: Cross multiply
   35,777.98x = 53,676.52 × 12,404.40
4. Step 4: Simplify right side
   35,777.98x = 665,825,024.69
5. Step 5: Solve for x
   x = 665,825,024.69/35,777.98
6. Step 6: Final answer
   x = 18,609.91