Finding the Fourth Proportional to 17,426.91, 26,139.48 and 5,418.96

Step by Step Solution

1. Step 1: Write the proportion equation
   17,426.91 : 26,139.48 = 5,418.96 : x
2. Step 2: Convert to fraction form
   17,426.91/26,139.48 = 5,418.96/x
3. Step 3: Cross multiply
   17,426.91x = 26,139.48 × 5,418.96
4. Step 4: Simplify right side
   17,426.91x = 141,648,796.54
5. Step 5: Solve for x
   x = 141,648,796.54/17,426.91
6. Step 6: Final answer
   x = 8,128.16