Finding the Fourth Proportional to 12,867.86, 17,757.71 and 7,202.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,867.86 : 17,757.71 = 7,202.72 : x
2. Step 2: Convert to fraction form
   12,867.86/17,757.71 = 7,202.72/x
3. Step 3: Cross multiply
   12,867.86x = 17,757.71 × 7,202.72
4. Step 4: Simplify right side
   12,867.86x = 127,903,791.67
5. Step 5: Solve for x
   x = 127,903,791.67/12,867.86
6. Step 6: Final answer
   x = 9,939.79