Finding the Fourth Proportional to 12,826.54, 17,696.76 and 12,403.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,826.54 : 17,696.76 = 12,403.72 : x
2. Step 2: Convert to fraction form
   12,826.54/17,696.76 = 12,403.72/x
3. Step 3: Cross multiply
   12,826.54x = 17,696.76 × 12,403.72
4. Step 4: Simplify right side
   12,826.54x = 219,505,655.95
5. Step 5: Solve for x
   x = 219,505,655.95/12,826.54
6. Step 6: Final answer
   x = 17,113.40