Finding the Fourth Proportional to 12,378.07, 17,081.52 and 7,072.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,378.07 : 17,081.52 = 7,072.03 : x
2. Step 2: Convert to fraction form
   12,378.07/17,081.52 = 7,072.03/x
3. Step 3: Cross multiply
   12,378.07x = 17,081.52 × 7,072.03
4. Step 4: Simplify right side
   12,378.07x = 120,801,021.89
5. Step 5: Solve for x
   x = 120,801,021.89/12,378.07
6. Step 6: Final answer
   x = 9,759.28