Finding the Fourth Proportional to 2,103.30, 3,156.30 and 804.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.30 : 3,156.30 = 804.69 : x
2. Step 2: Convert to fraction form
   2,103.30/3,156.30 = 804.69/x
3. Step 3: Cross multiply
   2,103.30x = 3,156.30 × 804.69
4. Step 4: Simplify right side
   2,103.30x = 2,539,843.05
5. Step 5: Solve for x
   x = 2,539,843.05/2,103.30
6. Step 6: Final answer
   x = 1,207.55