Finding the Fourth Proportional to 3,487.86, 5,219.37 and 2,561.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,487.86 : 5,219.37 = 2,561.22 : x
2. Step 2: Convert to fraction form
   3,487.86/5,219.37 = 2,561.22/x
3. Step 3: Cross multiply
   3,487.86x = 5,219.37 × 2,561.22
4. Step 4: Simplify right side
   3,487.86x = 13,367,954.83
5. Step 5: Solve for x
   x = 13,367,954.83/3,487.86
6. Step 6: Final answer
   x = 3,832.71