Finding the Fourth Proportional to 12,820.14, 17,690.67 and 7,154.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.14 : 17,690.67 = 7,154.46 : x
2. Step 2: Convert to fraction form
   12,820.14/17,690.67 = 7,154.46/x
3. Step 3: Cross multiply
   12,820.14x = 17,690.67 × 7,154.46
4. Step 4: Simplify right side
   12,820.14x = 126,567,190.89
5. Step 5: Solve for x
   x = 126,567,190.89/12,820.14
6. Step 6: Final answer
   x = 9,872.53