Finding the Fourth Proportional to 11,637.92, 16,055.35 and 9,109.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,637.92 : 16,055.35 = 9,109.89 : x
2. Step 2: Convert to fraction form
   11,637.92/16,055.35 = 9,109.89/x
3. Step 3: Cross multiply
   11,637.92x = 16,055.35 × 9,109.89
4. Step 4: Simplify right side
   11,637.92x = 146,262,346.59
5. Step 5: Solve for x
   x = 146,262,346.59/11,637.92
6. Step 6: Final answer
   x = 12,567.74