Finding the Fourth Proportional to 1,404.02, 2,103.23 and 1,289.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.02 : 2,103.23 = 1,289.21 : x
2. Step 2: Convert to fraction form
   1,404.02/2,103.23 = 1,289.21/x
3. Step 3: Cross multiply
   1,404.02x = 2,103.23 × 1,289.21
4. Step 4: Simplify right side
   1,404.02x = 2,711,497.86
5. Step 5: Solve for x
   x = 2,711,497.86/1,404.02
6. Step 6: Final answer
   x = 1,931.24