Finding the Fourth Proportional to 12,404.64, 18,590.76 and 10,661.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.64 : 18,590.76 = 10,661.52 : x
2. Step 2: Convert to fraction form
   12,404.64/18,590.76 = 10,661.52/x
3. Step 3: Cross multiply
   12,404.64x = 18,590.76 × 10,661.52
4. Step 4: Simplify right side
   12,404.64x = 198,205,759.56
5. Step 5: Solve for x
   x = 198,205,759.56/12,404.64
6. Step 6: Final answer
   x = 15,978.36