Finding the Fourth Proportional to 8,433.93, 12,636.78 and 5,140.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,433.93 : 12,636.78 = 5,140.10 : x
2. Step 2: Convert to fraction form
   8,433.93/12,636.78 = 5,140.10/x
3. Step 3: Cross multiply
   8,433.93x = 12,636.78 × 5,140.10
4. Step 4: Simplify right side
   8,433.93x = 64,954,249.69
5. Step 5: Solve for x
   x = 64,954,249.69/8,433.93
6. Step 6: Final answer
   x = 7,701.54