Finding the Fourth Proportional to 2,574.09, 3,859.16 and 1,276.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.09 : 3,859.16 = 1,276.47 : x
2. Step 2: Convert to fraction form
   2,574.09/3,859.16 = 1,276.47/x
3. Step 3: Cross multiply
   2,574.09x = 3,859.16 × 1,276.47
4. Step 4: Simplify right side
   2,574.09x = 4,926,095.58
5. Step 5: Solve for x
   x = 4,926,095.58/2,574.09
6. Step 6: Final answer
   x = 1,913.72