Finding the Fourth Proportional to 3,320.75, 4,980.78 and 2,084.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,320.75 : 4,980.78 = 2,084.50 : x
2. Step 2: Convert to fraction form
   3,320.75/4,980.78 = 2,084.50/x
3. Step 3: Cross multiply
   3,320.75x = 4,980.78 × 2,084.50
4. Step 4: Simplify right side
   3,320.75x = 10,382,411.01
5. Step 5: Solve for x
   x = 10,382,411.01/3,320.75
6. Step 6: Final answer
   x = 3,126.53