Finding the Fourth Proportional to 12,667.35, 17,480.28 and 7,078.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.35 : 17,480.28 = 7,078.35 : x
2. Step 2: Convert to fraction form
   12,667.35/17,480.28 = 7,078.35/x
3. Step 3: Cross multiply
   12,667.35x = 17,480.28 × 7,078.35
4. Step 4: Simplify right side
   12,667.35x = 123,731,539.94
5. Step 5: Solve for x
   x = 123,731,539.94/12,667.35
6. Step 6: Final answer
   x = 9,767.75