Finding the Fourth Proportional to 3,616.41, 4,990.61 and 2,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,616.41 : 4,990.61 = 2,124.50 : x
2. Step 2: Convert to fraction form
   3,616.41/4,990.61 = 2,124.50/x
3. Step 3: Cross multiply
   3,616.41x = 4,990.61 × 2,124.50
4. Step 4: Simplify right side
   3,616.41x = 10,602,531.30
5. Step 5: Solve for x
   x = 10,602,531.30/3,616.41
6. Step 6: Final answer
   x = 2,931.78