Finding the Fourth Proportional to 2,103.57, 3,156.57 and 804.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.57 : 3,156.57 = 804.87 : x
2. Step 2: Convert to fraction form
   2,103.57/3,156.57 = 804.87/x
3. Step 3: Cross multiply
   2,103.57x = 3,156.57 × 804.87
4. Step 4: Simplify right side
   2,103.57x = 2,540,628.50
5. Step 5: Solve for x
   x = 2,540,628.50/2,103.57
6. Step 6: Final answer
   x = 1,207.77