Finding the Fourth Proportional to 17,820.72, 26,716.86 and 8,456.04

Step by Step Solution

1. Step 1: Write the proportion equation
   17,820.72 : 26,716.86 = 8,456.04 : x
2. Step 2: Convert to fraction form
   17,820.72/26,716.86 = 8,456.04/x
3. Step 3: Cross multiply
   17,820.72x = 26,716.86 × 8,456.04
4. Step 4: Simplify right side
   17,820.72x = 225,918,836.83
5. Step 5: Solve for x
   x = 225,918,836.83/17,820.72
6. Step 6: Final answer
   x = 12,677.31