Finding the Fourth Proportional to 12,378.42, 18,566.82 and 3,612.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,378.42 : 18,566.82 = 3,612.60 : x
2. Step 2: Convert to fraction form
   12,378.42/18,566.82 = 3,612.60/x
3. Step 3: Cross multiply
   12,378.42x = 18,566.82 × 3,612.60
4. Step 4: Simplify right side
   12,378.42x = 67,074,493.93
5. Step 5: Solve for x
   x = 67,074,493.93/12,378.42
6. Step 6: Final answer
   x = 5,418.66