Finding the Fourth Proportional to 11,672.78, 16,103.82 and 7,188.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,672.78 : 16,103.82 = 7,188.75 : x
2. Step 2: Convert to fraction form
   11,672.78/16,103.82 = 7,188.75/x
3. Step 3: Cross multiply
   11,672.78x = 16,103.82 × 7,188.75
4. Step 4: Simplify right side
   11,672.78x = 115,766,336.03
5. Step 5: Solve for x
   x = 115,766,336.03/11,672.78
6. Step 6: Final answer
   x = 9,917.64