Finding the Fourth Proportional to 11,905.41, 16,392.06 and 10,109.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,905.41 : 16,392.06 = 10,109.15 : x
2. Step 2: Convert to fraction form
   11,905.41/16,392.06 = 10,109.15/x
3. Step 3: Cross multiply
   11,905.41x = 16,392.06 × 10,109.15
4. Step 4: Simplify right side
   11,905.41x = 165,709,793.35
5. Step 5: Solve for x
   x = 165,709,793.35/11,905.41
6. Step 6: Final answer
   x = 13,918.86