Finding the Fourth Proportional to 12,407.69, 18,611.69 and 3,642.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.69 : 18,611.69 = 3,642.77 : x
2. Step 2: Convert to fraction form
   12,407.69/18,611.69 = 3,642.77/x
3. Step 3: Cross multiply
   12,407.69x = 18,611.69 × 3,642.77
4. Step 4: Simplify right side
   12,407.69x = 67,797,994.71
5. Step 5: Solve for x
   x = 67,797,994.71/12,407.69
6. Step 6: Final answer
   x = 5,464.19