Finding the Fourth Proportional to 12,698.09, 17,525.31 and 7,918.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.09 : 17,525.31 = 7,918.82 : x
2. Step 2: Convert to fraction form
   12,698.09/17,525.31 = 7,918.82/x
3. Step 3: Cross multiply
   12,698.09x = 17,525.31 × 7,918.82
4. Step 4: Simplify right side
   12,698.09x = 138,779,648.11
5. Step 5: Solve for x
   x = 138,779,648.11/12,698.09
6. Step 6: Final answer
   x = 10,929.18