Finding the Fourth Proportional to 12,404.99, 18,607.59 and 3,640.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.99 : 18,607.59 = 3,640.05 : x
2. Step 2: Convert to fraction form
   12,404.99/18,607.59 = 3,640.05/x
3. Step 3: Cross multiply
   12,404.99x = 18,607.59 × 3,640.05
4. Step 4: Simplify right side
   12,404.99x = 67,732,557.98
5. Step 5: Solve for x
   x = 67,732,557.98/12,404.99
6. Step 6: Final answer
   x = 5,460.10