Finding the Fourth Proportional to 12,759.31, 17,607.13 and 7,170.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,759.31 : 17,607.13 = 7,170.31 : x
2. Step 2: Convert to fraction form
   12,759.31/17,607.13 = 7,170.31/x
3. Step 3: Cross multiply
   12,759.31x = 17,607.13 × 7,170.31
4. Step 4: Simplify right side
   12,759.31x = 126,248,580.31
5. Step 5: Solve for x
   x = 126,248,580.31/12,759.31
6. Step 6: Final answer
   x = 9,894.62