Finding the Fourth Proportional to 3,860.71, 5,784.23 and 1,776.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,860.71 : 5,784.23 = 1,776.31 : x
2. Step 2: Convert to fraction form
   3,860.71/5,784.23 = 1,776.31/x
3. Step 3: Cross multiply
   3,860.71x = 5,784.23 × 1,776.31
4. Step 4: Simplify right side
   3,860.71x = 10,274,575.57
5. Step 5: Solve for x
   x = 10,274,575.57/3,860.71
6. Step 6: Final answer
   x = 2,661.32