Finding the Fourth Proportional to 12,844.86, 17,720.55 and 8,645.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,844.86 : 17,720.55 = 8,645.82 : x
2. Step 2: Convert to fraction form
   12,844.86/17,720.55 = 8,645.82/x
3. Step 3: Cross multiply
   12,844.86x = 17,720.55 × 8,645.82
4. Step 4: Simplify right side
   12,844.86x = 153,208,685.60
5. Step 5: Solve for x
   x = 153,208,685.60/12,844.86
6. Step 6: Final answer
   x = 11,927.63