Finding the Fourth Proportional to 12,868.05, 17,756.42 and 7,203.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.05 : 17,756.42 = 7,203.11 : x
2. Step 2: Convert to fraction form
   12,868.05/17,756.42 = 7,203.11/x
3. Step 3: Cross multiply
   12,868.05x = 17,756.42 × 7,203.11
4. Step 4: Simplify right side
   12,868.05x = 127,901,321.67
5. Step 5: Solve for x
   x = 127,901,321.67/12,868.05
6. Step 6: Final answer
   x = 9,939.45