Finding the Fourth Proportional to 2,783.57, 3,837.78 and 1,987.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.57 : 3,837.78 = 1,987.84 : x
2. Step 2: Convert to fraction form
   2,783.57/3,837.78 = 1,987.84/x
3. Step 3: Cross multiply
   2,783.57x = 3,837.78 × 1,987.84
4. Step 4: Simplify right side
   2,783.57x = 7,628,897.39
5. Step 5: Solve for x
   x = 7,628,897.39/2,783.57
6. Step 6: Final answer
   x = 2,740.69