Finding the Fourth Proportional to 2,059.50, 2,842.35 and 1,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.50 : 2,842.35 = 1,231.50 : x
2. Step 2: Convert to fraction form
   2,059.50/2,842.35 = 1,231.50/x
3. Step 3: Cross multiply
   2,059.50x = 2,842.35 × 1,231.50
4. Step 4: Simplify right side
   2,059.50x = 3,500,354.03
5. Step 5: Solve for x
   x = 3,500,354.03/2,059.50
6. Step 6: Final answer
   x = 1,699.61