Finding the Fourth Proportional to 17,609.94, 26,390.25 and 12,656.34

Step by Step Solution

1. Step 1: Write the proportion equation
   17,609.94 : 26,390.25 = 12,656.34 : x
2. Step 2: Convert to fraction form
   17,609.94/26,390.25 = 12,656.34/x
3. Step 3: Cross multiply
   17,609.94x = 26,390.25 × 12,656.34
4. Step 4: Simplify right side
   17,609.94x = 334,003,976.69
5. Step 5: Solve for x
   x = 334,003,976.69/17,609.94
6. Step 6: Final answer
   x = 18,966.79