Finding the Fourth Proportional to 17,938.05, 26,905.72 and 7,945.89

Step by Step Solution

1. Step 1: Write the proportion equation
   17,938.05 : 26,905.72 = 7,945.89 : x
2. Step 2: Convert to fraction form
   17,938.05/26,905.72 = 7,945.89/x
3. Step 3: Cross multiply
   17,938.05x = 26,905.72 × 7,945.89
4. Step 4: Simplify right side
   17,938.05x = 213,789,891.49
5. Step 5: Solve for x
   x = 213,789,891.49/17,938.05
6. Step 6: Final answer
   x = 11,918.23