Finding the Fourth Proportional to 41,087.69, 61,640.78 and 13,009.43

Step by Step Solution

1. Step 1: Write the proportion equation
   41,087.69 : 61,640.78 = 13,009.43 : x
2. Step 2: Convert to fraction form
   41,087.69/61,640.78 = 13,009.43/x
3. Step 3: Cross multiply
   41,087.69x = 61,640.78 × 13,009.43
4. Step 4: Simplify right side
   41,087.69x = 801,911,039.30
5. Step 5: Solve for x
   x = 801,911,039.30/41,087.69
6. Step 6: Final answer
   x = 19,517.07