Finding the Fourth Proportional to 12,873.86, 17,764.45 and 7,207.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,873.86 : 17,764.45 = 7,207.82 : x
2. Step 2: Convert to fraction form
   12,873.86/17,764.45 = 7,207.82/x
3. Step 3: Cross multiply
   12,873.86x = 17,764.45 × 7,207.82
4. Step 4: Simplify right side
   12,873.86x = 128,042,958.00
5. Step 5: Solve for x
   x = 128,042,958.00/12,873.86
6. Step 6: Final answer
   x = 9,945.96