Finding the Fourth Proportional to 11,916.05, 17,870.36 and 8,241.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,916.05 : 17,870.36 = 8,241.89 : x
2. Step 2: Convert to fraction form
   11,916.05/17,870.36 = 8,241.89/x
3. Step 3: Cross multiply
   11,916.05x = 17,870.36 × 8,241.89
4. Step 4: Simplify right side
   11,916.05x = 147,285,410.82
5. Step 5: Solve for x
   x = 147,285,410.82/11,916.05
6. Step 6: Final answer
   x = 12,360.26