Finding the Fourth Proportional to 3,118.89, 4,681.98 and 2,190.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,118.89 : 4,681.98 = 2,190.63 : x
2. Step 2: Convert to fraction form
   3,118.89/4,681.98 = 2,190.63/x
3. Step 3: Cross multiply
   3,118.89x = 4,681.98 × 2,190.63
4. Step 4: Simplify right side
   3,118.89x = 10,256,485.85
5. Step 5: Solve for x
   x = 10,256,485.85/3,118.89
6. Step 6: Final answer
   x = 3,288.51