Finding the Fourth Proportional to 10,430.07, 15,636.89 and 5,161.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,430.07 : 15,636.89 = 5,161.38 : x
2. Step 2: Convert to fraction form
   10,430.07/15,636.89 = 5,161.38/x
3. Step 3: Cross multiply
   10,430.07x = 15,636.89 × 5,161.38
4. Step 4: Simplify right side
   10,430.07x = 80,707,885.57
5. Step 5: Solve for x
   x = 80,707,885.57/10,430.07
6. Step 6: Final answer
   x = 7,738.00