Finding the Fourth Proportional to 12,378.24, 18,570.06 and 3,613.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,378.24 : 18,570.06 = 3,613.95 : x
2. Step 2: Convert to fraction form
   12,378.24/18,570.06 = 3,613.95/x
3. Step 3: Cross multiply
   12,378.24x = 18,570.06 × 3,613.95
4. Step 4: Simplify right side
   12,378.24x = 67,111,268.34
5. Step 5: Solve for x
   x = 67,111,268.34/12,378.24
6. Step 6: Final answer
   x = 5,421.71