Finding the Fourth Proportional to 12,698.09, 19,040.72 and 7,434.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.09 : 19,040.72 = 7,434.69 : x
2. Step 2: Convert to fraction form
   12,698.09/19,040.72 = 7,434.69/x
3. Step 3: Cross multiply
   12,698.09x = 19,040.72 × 7,434.69
4. Step 4: Simplify right side
   12,698.09x = 141,561,869.16
5. Step 5: Solve for x
   x = 141,561,869.16/12,698.09
6. Step 6: Final answer
   x = 11,148.28