Finding the Fourth Proportional to 12,379.30, 18,570.04 and 3,494.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.30 : 18,570.04 = 3,494.69 : x
2. Step 2: Convert to fraction form
   12,379.30/18,570.04 = 3,494.69/x
3. Step 3: Cross multiply
   12,379.30x = 18,570.04 × 3,494.69
4. Step 4: Simplify right side
   12,379.30x = 64,896,533.09
5. Step 5: Solve for x
   x = 64,896,533.09/12,379.30
6. Step 6: Final answer
   x = 5,242.34