Finding the Fourth Proportional to 12,403.49, 17,112.06 and 8,156.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,403.49 : 17,112.06 = 8,156.79 : x
2. Step 2: Convert to fraction form
   12,403.49/17,112.06 = 8,156.79/x
3. Step 3: Cross multiply
   12,403.49x = 17,112.06 × 8,156.79
4. Step 4: Simplify right side
   12,403.49x = 139,579,479.89
5. Step 5: Solve for x
   x = 139,579,479.89/12,403.49
6. Step 6: Final answer
   x = 11,253.25