Finding the Fourth Proportional to 12,756.10, 17,603.32 and 7,167.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.10 : 17,603.32 = 7,167.10 : x
2. Step 2: Convert to fraction form
   12,756.10/17,603.32 = 7,167.10/x
3. Step 3: Cross multiply
   12,756.10x = 17,603.32 × 7,167.10
4. Step 4: Simplify right side
   12,756.10x = 126,164,754.77
5. Step 5: Solve for x
   x = 126,164,754.77/12,756.10
6. Step 6: Final answer
   x = 9,890.54