Finding the Fourth Proportional to 2,561.31, 3,842.51 and 1,079.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.31 : 3,842.51 = 1,079.69 : x
2. Step 2: Convert to fraction form
   2,561.31/3,842.51 = 1,079.69/x
3. Step 3: Cross multiply
   2,561.31x = 3,842.51 × 1,079.69
4. Step 4: Simplify right side
   2,561.31x = 4,148,695.01
5. Step 5: Solve for x
   x = 4,148,695.01/2,561.31
6. Step 6: Final answer
   x = 1,619.76