Finding the Fourth Proportional to 2,514.61, 3,770.43 and 870.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,514.61 : 3,770.43 = 870.31 : x
2. Step 2: Convert to fraction form
   2,514.61/3,770.43 = 870.31/x
3. Step 3: Cross multiply
   2,514.61x = 3,770.43 × 870.31
4. Step 4: Simplify right side
   2,514.61x = 3,281,442.93
5. Step 5: Solve for x
   x = 3,281,442.93/2,514.61
6. Step 6: Final answer
   x = 1,304.95