Finding the Fourth Proportional to 12,679.74, 17,510.58 and 10,449

Step by Step Solution

1. Step 1: Write the proportion equation
   12,679.74 : 17,510.58 = 10,449 : x
2. Step 2: Convert to fraction form
   12,679.74/17,510.58 = 10,449/x
3. Step 3: Cross multiply
   12,679.74x = 17,510.58 × 10,449
4. Step 4: Simplify right side
   12,679.74x = 182,968,050.42
5. Step 5: Solve for x
   x = 182,968,050.42/12,679.74
6. Step 6: Final answer
   x = 14,429.95