Finding the Fourth Proportional to 12,698.06, 17,521.24 and 7,979

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.06 : 17,521.24 = 7,979 : x
2. Step 2: Convert to fraction form
   12,698.06/17,521.24 = 7,979/x
3. Step 3: Cross multiply
   12,698.06x = 17,521.24 × 7,979
4. Step 4: Simplify right side
   12,698.06x = 139,801,973.96
5. Step 5: Solve for x
   x = 139,801,973.96/12,698.06
6. Step 6: Final answer
   x = 11,009.71