Finding the Fourth Proportional to 2,140.57, 3,208.38 and 983.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.57 : 3,208.38 = 983.89 : x
2. Step 2: Convert to fraction form
   2,140.57/3,208.38 = 983.89/x
3. Step 3: Cross multiply
   2,140.57x = 3,208.38 × 983.89
4. Step 4: Simplify right side
   2,140.57x = 3,156,693.00
5. Step 5: Solve for x
   x = 3,156,693.00/2,140.57
6. Step 6: Final answer
   x = 1,474.70