Finding the Fourth Proportional to 2,784.10, 3,839.79 and 1,998.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.10 : 3,839.79 = 1,998.58 : x
2. Step 2: Convert to fraction form
   2,784.10/3,839.79 = 1,998.58/x
3. Step 3: Cross multiply
   2,784.10x = 3,839.79 × 1,998.58
4. Step 4: Simplify right side
   2,784.10x = 7,674,127.50
5. Step 5: Solve for x
   x = 7,674,127.50/2,784.10
6. Step 6: Final answer
   x = 2,756.41