Finding the Fourth Proportional to 11,899.56, 16,407.50 and 9,654.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,899.56 : 16,407.50 = 9,654.42 : x
2. Step 2: Convert to fraction form
   11,899.56/16,407.50 = 9,654.42/x
3. Step 3: Cross multiply
   11,899.56x = 16,407.50 × 9,654.42
4. Step 4: Simplify right side
   11,899.56x = 158,404,896.15
5. Step 5: Solve for x
   x = 158,404,896.15/11,899.56
6. Step 6: Final answer
   x = 13,311.83