Finding the Fourth Proportional to 2,335.89, 3,504.87 and 1,239.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.89 : 3,504.87 = 1,239.99 : x
2. Step 2: Convert to fraction form
   2,335.89/3,504.87 = 1,239.99/x
3. Step 3: Cross multiply
   2,335.89x = 3,504.87 × 1,239.99
4. Step 4: Simplify right side
   2,335.89x = 4,346,003.75
5. Step 5: Solve for x
   x = 4,346,003.75/2,335.89
6. Step 6: Final answer
   x = 1,860.53