Finding the Fourth Proportional to 2,103.71, 3,153.73 and 870.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.71 : 3,153.73 = 870.35 : x
2. Step 2: Convert to fraction form
   2,103.71/3,153.73 = 870.35/x
3. Step 3: Cross multiply
   2,103.71x = 3,153.73 × 870.35
4. Step 4: Simplify right side
   2,103.71x = 2,744,848.91
5. Step 5: Solve for x
   x = 2,744,848.91/2,103.71
6. Step 6: Final answer
   x = 1,304.77