Finding the Fourth Proportional to 12,868.63, 17,758.71 and 6,980.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.63 : 17,758.71 = 6,980.63 : x
2. Step 2: Convert to fraction form
   12,868.63/17,758.71 = 6,980.63/x
3. Step 3: Cross multiply
   12,868.63x = 17,758.71 × 6,980.63
4. Step 4: Simplify right side
   12,868.63x = 123,966,983.79
5. Step 5: Solve for x
   x = 123,966,983.79/12,868.63
6. Step 6: Final answer
   x = 9,633.27