Finding the Fourth Proportional to 2,587.31, 3,895.09 and 1,770.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.31 : 3,895.09 = 1,770.72 : x
2. Step 2: Convert to fraction form
   2,587.31/3,895.09 = 1,770.72/x
3. Step 3: Cross multiply
   2,587.31x = 3,895.09 × 1,770.72
4. Step 4: Simplify right side
   2,587.31x = 6,897,113.76
5. Step 5: Solve for x
   x = 6,897,113.76/2,587.31
6. Step 6: Final answer
   x = 2,665.75