Finding the Fourth Proportional to 12,679.16, 17,497.78 and 7,834.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,679.16 : 17,497.78 = 7,834.96 : x
2. Step 2: Convert to fraction form
   12,679.16/17,497.78 = 7,834.96/x
3. Step 3: Cross multiply
   12,679.16x = 17,497.78 × 7,834.96
4. Step 4: Simplify right side
   12,679.16x = 137,094,406.39
5. Step 5: Solve for x
   x = 137,094,406.39/12,679.16
6. Step 6: Final answer
   x = 10,812.58