Finding the Fourth Proportional to 2,849.12, 3,931.31 and 1,903.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,849.12 : 3,931.31 = 1,903.40 : x
2. Step 2: Convert to fraction form
   2,849.12/3,931.31 = 1,903.40/x
3. Step 3: Cross multiply
   2,849.12x = 3,931.31 × 1,903.40
4. Step 4: Simplify right side
   2,849.12x = 7,482,855.30
5. Step 5: Solve for x
   x = 7,482,855.30/2,849.12
6. Step 6: Final answer
   x = 2,626.38