Finding the Fourth Proportional to 12,380.13, 17,084.61 and 7,078.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.13 : 17,084.61 = 7,078.05 : x
2. Step 2: Convert to fraction form
   12,380.13/17,084.61 = 7,078.05/x
3. Step 3: Cross multiply
   12,380.13x = 17,084.61 × 7,078.05
4. Step 4: Simplify right side
   12,380.13x = 120,925,723.81
5. Step 5: Solve for x
   x = 120,925,723.81/12,380.13
6. Step 6: Final answer
   x = 9,767.73