Finding the Fourth Proportional to 2,561.98, 3,842.52 and 712.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.98 : 3,842.52 = 712.60 : x
2. Step 2: Convert to fraction form
   2,561.98/3,842.52 = 712.60/x
3. Step 3: Cross multiply
   2,561.98x = 3,842.52 × 712.60
4. Step 4: Simplify right side
   2,561.98x = 2,738,179.75
5. Step 5: Solve for x
   x = 2,738,179.75/2,561.98
6. Step 6: Final answer
   x = 1,068.77