Finding the Fourth Proportional to 12,380.87, 18,574.31 and 7,119.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.87 : 18,574.31 = 7,119.25 : x
2. Step 2: Convert to fraction form
   12,380.87/18,574.31 = 7,119.25/x
3. Step 3: Cross multiply
   12,380.87x = 18,574.31 × 7,119.25
4. Step 4: Simplify right side
   12,380.87x = 132,235,127.83
5. Step 5: Solve for x
   x = 132,235,127.83/12,380.87
6. Step 6: Final answer
   x = 10,680.60