Finding the Fourth Proportional to 8,642.91, 11,925.32 and 5,104.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,642.91 : 11,925.32 = 5,104.29 : x
2. Step 2: Convert to fraction form
   8,642.91/11,925.32 = 5,104.29/x
3. Step 3: Cross multiply
   8,642.91x = 11,925.32 × 5,104.29
4. Step 4: Simplify right side
   8,642.91x = 60,870,266.10
5. Step 5: Solve for x
   x = 60,870,266.10/8,642.91
6. Step 6: Final answer
   x = 7,042.80