Finding the Fourth Proportional to 11,886.51, 16,402.25 and 7,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,886.51 : 16,402.25 = 7,105.50 : x
2. Step 2: Convert to fraction form
   11,886.51/16,402.25 = 7,105.50/x
3. Step 3: Cross multiply
   11,886.51x = 16,402.25 × 7,105.50
4. Step 4: Simplify right side
   11,886.51x = 116,546,187.38
5. Step 5: Solve for x
   x = 116,546,187.38/11,886.51
6. Step 6: Final answer
   x = 9,804.91