Finding the Fourth Proportional to 11,364.88, 15,687.80 and 8,404.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,364.88 : 15,687.80 = 8,404.54 : x
2. Step 2: Convert to fraction form
   11,364.88/15,687.80 = 8,404.54/x
3. Step 3: Cross multiply
   11,364.88x = 15,687.80 × 8,404.54
4. Step 4: Simplify right side
   11,364.88x = 131,848,742.61
5. Step 5: Solve for x
   x = 131,848,742.61/11,364.88
6. Step 6: Final answer
   x = 11,601.42