Finding the Fourth Proportional to 17,078.74, 25,620.84 and 7,218.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,078.74 : 25,620.84 = 7,218.10 : x
2. Step 2: Convert to fraction form
   17,078.74/25,620.84 = 7,218.10/x
3. Step 3: Cross multiply
   17,078.74x = 25,620.84 × 7,218.10
4. Step 4: Simplify right side
   17,078.74x = 184,933,785.20
5. Step 5: Solve for x
   x = 184,933,785.20/17,078.74
6. Step 6: Final answer
   x = 10,828.30