Finding the Fourth Proportional to 2,561.55, 3,838.08 and 1,557.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.55 : 3,838.08 = 1,557.86 : x
2. Step 2: Convert to fraction form
   2,561.55/3,838.08 = 1,557.86/x
3. Step 3: Cross multiply
   2,561.55x = 3,838.08 × 1,557.86
4. Step 4: Simplify right side
   2,561.55x = 5,979,173.92
5. Step 5: Solve for x
   x = 5,979,173.92/2,561.55
6. Step 6: Final answer
   x = 2,334.20