Finding the Fourth Proportional to 8,940.78, 12,338.82 and 5,164.65

Step by Step Solution

1. Step 1: Write the proportion equation
   8,940.78 : 12,338.82 = 5,164.65 : x
2. Step 2: Convert to fraction form
   8,940.78/12,338.82 = 5,164.65/x
3. Step 3: Cross multiply
   8,940.78x = 12,338.82 × 5,164.65
4. Step 4: Simplify right side
   8,940.78x = 63,725,686.71
5. Step 5: Solve for x
   x = 63,725,686.71/8,940.78
6. Step 6: Final answer
   x = 7,127.53