Finding the Fourth Proportional to 12,380.89, 17,086.79 and 7,074.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.89 : 17,086.79 = 7,074.67 : x
2. Step 2: Convert to fraction form
   12,380.89/17,086.79 = 7,074.67/x
3. Step 3: Cross multiply
   12,380.89x = 17,086.79 × 7,074.67
4. Step 4: Simplify right side
   12,380.89x = 120,883,400.61
5. Step 5: Solve for x
   x = 120,883,400.61/12,380.89
6. Step 6: Final answer
   x = 9,763.71