Finding the Fourth Proportional to 12,404.79, 18,610.02 and 3,640.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.79 : 18,610.02 = 3,640.41 : x
2. Step 2: Convert to fraction form
   12,404.79/18,610.02 = 3,640.41/x
3. Step 3: Cross multiply
   12,404.79x = 18,610.02 × 3,640.41
4. Step 4: Simplify right side
   12,404.79x = 67,748,102.91
5. Step 5: Solve for x
   x = 67,748,102.91/12,404.79
6. Step 6: Final answer
   x = 5,461.45