Finding the Fourth Proportional to 12,379.42, 18,570.23 and 3,494.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.42 : 18,570.23 = 3,494.81 : x
2. Step 2: Convert to fraction form
   12,379.42/18,570.23 = 3,494.81/x
3. Step 3: Cross multiply
   12,379.42x = 18,570.23 × 3,494.81
4. Step 4: Simplify right side
   12,379.42x = 64,899,467.56
5. Step 5: Solve for x
   x = 64,899,467.56/12,379.42
6. Step 6: Final answer
   x = 5,242.53