Finding the Fourth Proportional to 17,942.01, 26,899.62 and 12,379.49

Step by Step Solution

1. Step 1: Write the proportion equation
   17,942.01 : 26,899.62 = 12,379.49 : x
2. Step 2: Convert to fraction form
   17,942.01/26,899.62 = 12,379.49/x
3. Step 3: Cross multiply
   17,942.01x = 26,899.62 × 12,379.49
4. Step 4: Simplify right side
   17,942.01x = 333,003,442.30
5. Step 5: Solve for x
   x = 333,003,442.30/17,942.01
6. Step 6: Final answer
   x = 18,559.99