Finding the Fourth Proportional to 2,583.21, 3,876.47 and 939.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,583.21 : 3,876.47 = 939.60 : x
2. Step 2: Convert to fraction form
   2,583.21/3,876.47 = 939.60/x
3. Step 3: Cross multiply
   2,583.21x = 3,876.47 × 939.60
4. Step 4: Simplify right side
   2,583.21x = 3,642,326.51
5. Step 5: Solve for x
   x = 3,642,326.51/2,583.21
6. Step 6: Final answer
   x = 1,410.00