Finding the Fourth Proportional to 12,679.69, 17,498.78 and 7,090.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,679.69 : 17,498.78 = 7,090.69 : x
2. Step 2: Convert to fraction form
   12,679.69/17,498.78 = 7,090.69/x
3. Step 3: Cross multiply
   12,679.69x = 17,498.78 × 7,090.69
4. Step 4: Simplify right side
   12,679.69x = 124,078,398.34
5. Step 5: Solve for x
   x = 124,078,398.34/12,679.69
6. Step 6: Final answer
   x = 9,785.60