Finding the Fourth Proportional to 2,513.84, 3,770.96 and 870.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.84 : 3,770.96 = 870.35 : x
2. Step 2: Convert to fraction form
   2,513.84/3,770.96 = 870.35/x
3. Step 3: Cross multiply
   2,513.84x = 3,770.96 × 870.35
4. Step 4: Simplify right side
   2,513.84x = 3,282,031.83
5. Step 5: Solve for x
   x = 3,282,031.83/2,513.84
6. Step 6: Final answer
   x = 1,305.59