Finding the Fourth Proportional to 12,685.40, 17,501.94 and 7,379.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.40 : 17,501.94 = 7,379.24 : x
2. Step 2: Convert to fraction form
   12,685.40/17,501.94 = 7,379.24/x
3. Step 3: Cross multiply
   12,685.40x = 17,501.94 × 7,379.24
4. Step 4: Simplify right side
   12,685.40x = 129,151,015.73
5. Step 5: Solve for x
   x = 129,151,015.73/12,685.40
6. Step 6: Final answer
   x = 10,181.08