Finding the Fourth Proportional to 3,900.87, 5,851.59 and 1,303.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.87 : 5,851.59 = 1,303.80 : x
2. Step 2: Convert to fraction form
   3,900.87/5,851.59 = 1,303.80/x
3. Step 3: Cross multiply
   3,900.87x = 5,851.59 × 1,303.80
4. Step 4: Simplify right side
   3,900.87x = 7,629,303.04
5. Step 5: Solve for x
   x = 7,629,303.04/3,900.87
6. Step 6: Final answer
   x = 1,955.80