Finding the Fourth Proportional to 8,488.77, 12,730.71 and 2,940.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.77 : 12,730.71 = 2,940.69 : x
2. Step 2: Convert to fraction form
   8,488.77/12,730.71 = 2,940.69/x
3. Step 3: Cross multiply
   8,488.77x = 12,730.71 × 2,940.69
4. Step 4: Simplify right side
   8,488.77x = 37,437,071.59
5. Step 5: Solve for x
   x = 37,437,071.59/8,488.77
6. Step 6: Final answer
   x = 4,410.19