Finding the Fourth Proportional to 8,643.65, 12,962.59 and 3,377.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,643.65 : 12,962.59 = 3,377.30 : x
2. Step 2: Convert to fraction form
   8,643.65/12,962.59 = 3,377.30/x
3. Step 3: Cross multiply
   8,643.65x = 12,962.59 × 3,377.30
4. Step 4: Simplify right side
   8,643.65x = 43,778,573.86
5. Step 5: Solve for x
   x = 43,778,573.86/8,643.65
6. Step 6: Final answer
   x = 5,064.82