Finding the Fourth Proportional to 10,680.74, 14,744.40 and 7,146.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,680.74 : 14,744.40 = 7,146.26 : x
2. Step 2: Convert to fraction form
   10,680.74/14,744.40 = 7,146.26/x
3. Step 3: Cross multiply
   10,680.74x = 14,744.40 × 7,146.26
4. Step 4: Simplify right side
   10,680.74x = 105,367,315.94
5. Step 5: Solve for x
   x = 105,367,315.94/10,680.74
6. Step 6: Final answer
   x = 9,865.17