Finding the Fourth Proportional to 11,006.31, 16,488.34 and 8,789.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,006.31 : 16,488.34 = 8,789.54 : x
2. Step 2: Convert to fraction form
   11,006.31/16,488.34 = 8,789.54/x
3. Step 3: Cross multiply
   11,006.31x = 16,488.34 × 8,789.54
4. Step 4: Simplify right side
   11,006.31x = 144,924,923.96
5. Step 5: Solve for x
   x = 144,924,923.96/11,006.31
6. Step 6: Final answer
   x = 13,167.44