Finding the Fourth Proportional to 2,141.04, 3,209.20 and 1,399.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.04 : 3,209.20 = 1,399.76 : x
2. Step 2: Convert to fraction form
   2,141.04/3,209.20 = 1,399.76/x
3. Step 3: Cross multiply
   2,141.04x = 3,209.20 × 1,399.76
4. Step 4: Simplify right side
   2,141.04x = 4,492,109.79
5. Step 5: Solve for x
   x = 4,492,109.79/2,141.04
6. Step 6: Final answer
   x = 2,098.10