Finding the Fourth Proportional to 8,345.69, 12,518.20 and 2,105.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,345.69 : 12,518.20 = 2,105.62 : x
2. Step 2: Convert to fraction form
   8,345.69/12,518.20 = 2,105.62/x
3. Step 3: Cross multiply
   8,345.69x = 12,518.20 × 2,105.62
4. Step 4: Simplify right side
   8,345.69x = 26,358,594.51
5. Step 5: Solve for x
   x = 26,358,594.51/8,345.69
6. Step 6: Final answer
   x = 3,158.35