Finding the Fourth Proportional to 11,818.77, 16,333.41 and 9,691.00

Step by Step Solution

1. Step 1: Write the proportion equation
   11,818.77 : 16,333.41 = 9,691.00 : x
2. Step 2: Convert to fraction form
   11,818.77/16,333.41 = 9,691.00/x
3. Step 3: Cross multiply
   11,818.77x = 16,333.41 × 9,691.00
4. Step 4: Simplify right side
   11,818.77x = 158,287,035.48
5. Step 5: Solve for x
   x = 158,287,035.48/11,818.77
6. Step 6: Final answer
   x = 13,392.86