Finding the Fourth Proportional to 12,843.83, 17,722.32 and 7,178.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,843.83 : 17,722.32 = 7,178.63 : x
2. Step 2: Convert to fraction form
   12,843.83/17,722.32 = 7,178.63/x
3. Step 3: Cross multiply
   12,843.83x = 17,722.32 × 7,178.63
4. Step 4: Simplify right side
   12,843.83x = 127,221,987.73
5. Step 5: Solve for x
   x = 127,221,987.73/12,843.83
6. Step 6: Final answer
   x = 9,905.30