Finding the Fourth Proportional to 12,697.47, 17,531.17 and 7,919.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,697.47 : 17,531.17 = 7,919.28 : x
2. Step 2: Convert to fraction form
   12,697.47/17,531.17 = 7,919.28/x
3. Step 3: Cross multiply
   12,697.47x = 17,531.17 × 7,919.28
4. Step 4: Simplify right side
   12,697.47x = 138,834,224.16
5. Step 5: Solve for x
   x = 138,834,224.16/12,697.47
6. Step 6: Final answer
   x = 10,934.01