Finding the Fourth Proportional to 10,436.07, 15,645.89 and 5,167.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,436.07 : 15,645.89 = 5,167.40 : x
2. Step 2: Convert to fraction form
   10,436.07/15,645.89 = 5,167.40/x
3. Step 3: Cross multiply
   10,436.07x = 15,645.89 × 5,167.40
4. Step 4: Simplify right side
   10,436.07x = 80,848,467.92
5. Step 5: Solve for x
   x = 80,848,467.92/10,436.07
6. Step 6: Final answer
   x = 7,747.02