Finding the Fourth Proportional to 12,386.86, 17,093.82 and 6,721.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.86 : 17,093.82 = 6,721.63 : x
2. Step 2: Convert to fraction form
   12,386.86/17,093.82 = 6,721.63/x
3. Step 3: Cross multiply
   12,386.86x = 17,093.82 × 6,721.63
4. Step 4: Simplify right side
   12,386.86x = 114,898,333.33
5. Step 5: Solve for x
   x = 114,898,333.33/12,386.86
6. Step 6: Final answer
   x = 9,275.82