Finding the Fourth Proportional to 12,697, 17,521.86 and 7,108.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,697 : 17,521.86 = 7,108.12 : x
2. Step 2: Convert to fraction form
   12,697/17,521.86 = 7,108.12/x
3. Step 3: Cross multiply
   12,697x = 17,521.86 × 7,108.12
4. Step 4: Simplify right side
   12,697x = 124,547,483.50
5. Step 5: Solve for x
   x = 124,547,483.50/12,697
6. Step 6: Final answer
   x = 9,809.21