Finding the Fourth Proportional to 17,940.06, 26,908.72 and 7,947.90

Step by Step Solution

1. Step 1: Write the proportion equation
   17,940.06 : 26,908.72 = 7,947.90 : x
2. Step 2: Convert to fraction form
   17,940.06/26,908.72 = 7,947.90/x
3. Step 3: Cross multiply
   17,940.06x = 26,908.72 × 7,947.90
4. Step 4: Simplify right side
   17,940.06x = 213,867,815.69
5. Step 5: Solve for x
   x = 213,867,815.69/17,940.06
6. Step 6: Final answer
   x = 11,921.24