Finding the Fourth Proportional to 12,419.84, 17,146.68 and 7,706.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,419.84 : 17,146.68 = 7,706.72 : x
2. Step 2: Convert to fraction form
   12,419.84/17,146.68 = 7,706.72/x
3. Step 3: Cross multiply
   12,419.84x = 17,146.68 × 7,706.72
4. Step 4: Simplify right side
   12,419.84x = 132,144,661.69
5. Step 5: Solve for x
   x = 132,144,661.69/12,419.84
6. Step 6: Final answer
   x = 10,639.80