Finding the Fourth Proportional to 11,907.85, 16,395.42 and 10,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,907.85 : 16,395.42 = 10,111.56 : x
2. Step 2: Convert to fraction form
   11,907.85/16,395.42 = 10,111.56/x
3. Step 3: Cross multiply
   11,907.85x = 16,395.42 × 10,111.56
4. Step 4: Simplify right side
   11,907.85x = 165,783,273.06
5. Step 5: Solve for x
   x = 165,783,273.06/11,907.85
6. Step 6: Final answer
   x = 13,922.18