Finding the Fourth Proportional to 3,957.86, 5,463.69 and 2,561.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,957.86 : 5,463.69 = 2,561.06 : x
2. Step 2: Convert to fraction form
   3,957.86/5,463.69 = 2,561.06/x
3. Step 3: Cross multiply
   3,957.86x = 5,463.69 × 2,561.06
4. Step 4: Simplify right side
   3,957.86x = 13,992,837.91
5. Step 5: Solve for x
   x = 13,992,837.91/3,957.86
6. Step 6: Final answer
   x = 3,535.46