Finding the Fourth Proportional to 2,059.98, 2,842.78 and 1,115.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.98 : 2,842.78 = 1,115.78 : x
2. Step 2: Convert to fraction form
   2,059.98/2,842.78 = 1,115.78/x
3. Step 3: Cross multiply
   2,059.98x = 2,842.78 × 1,115.78
4. Step 4: Simplify right side
   2,059.98x = 3,171,911.49
5. Step 5: Solve for x
   x = 3,171,911.49/2,059.98
6. Step 6: Final answer
   x = 1,539.78