Finding the Fourth Proportional to 8,641.61, 11,925.45 and 5,105.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,641.61 : 11,925.45 = 5,105.06 : x
2. Step 2: Convert to fraction form
   8,641.61/11,925.45 = 5,105.06/x
3. Step 3: Cross multiply
   8,641.61x = 11,925.45 × 5,105.06
4. Step 4: Simplify right side
   8,641.61x = 60,880,078.15
5. Step 5: Solve for x
   x = 60,880,078.15/8,641.61
6. Step 6: Final answer
   x = 7,045.00