Finding the Fourth Proportional to 12,380.82, 17,086.70 and 7,074.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.82 : 17,086.70 = 7,074.61 : x
2. Step 2: Convert to fraction form
   12,380.82/17,086.70 = 7,074.61/x
3. Step 3: Cross multiply
   12,380.82x = 17,086.70 × 7,074.61
4. Step 4: Simplify right side
   12,380.82x = 120,881,738.69
5. Step 5: Solve for x
   x = 120,881,738.69/12,380.82
6. Step 6: Final answer
   x = 9,763.63