Finding the Fourth Proportional to 12,443.35, 17,165.78 and 7,963.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.35 : 17,165.78 = 7,963.51 : x
2. Step 2: Convert to fraction form
   12,443.35/17,165.78 = 7,963.51/x
3. Step 3: Cross multiply
   12,443.35x = 17,165.78 × 7,963.51
4. Step 4: Simplify right side
   12,443.35x = 136,699,820.87
5. Step 5: Solve for x
   x = 136,699,820.87/12,443.35
6. Step 6: Final answer
   x = 10,985.77