Finding the Fourth Proportional to 2,140.50, 2,953.91 and 1,209.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.50 : 2,953.91 = 1,209.02 : x
2. Step 2: Convert to fraction form
   2,140.50/2,953.91 = 1,209.02/x
3. Step 3: Cross multiply
   2,140.50x = 2,953.91 × 1,209.02
4. Step 4: Simplify right side
   2,140.50x = 3,571,336.27
5. Step 5: Solve for x
   x = 3,571,336.27/2,140.50
6. Step 6: Final answer
   x = 1,668.46