Finding the Fourth Proportional to 19,019.15, 26,255.59 and 12,656.35

Step by Step Solution

1. Step 1: Write the proportion equation
   19,019.15 : 26,255.59 = 12,656.35 : x
2. Step 2: Convert to fraction form
   19,019.15/26,255.59 = 12,656.35/x
3. Step 3: Cross multiply
   19,019.15x = 26,255.59 × 12,656.35
4. Step 4: Simplify right side
   19,019.15x = 332,300,008.87
5. Step 5: Solve for x
   x = 332,300,008.87/19,019.15
6. Step 6: Final answer
   x = 17,471.86