Finding the Fourth Proportional to 2,783.61, 3,839.92 and 1,887.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.61 : 3,839.92 = 1,887.39 : x
2. Step 2: Convert to fraction form
   2,783.61/3,839.92 = 1,887.39/x
3. Step 3: Cross multiply
   2,783.61x = 3,839.92 × 1,887.39
4. Step 4: Simplify right side
   2,783.61x = 7,247,421.89
5. Step 5: Solve for x
   x = 7,247,421.89/2,783.61
6. Step 6: Final answer
   x = 2,603.61