Finding the Fourth Proportional to 1,859.94, 2,790.18 and 561.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,859.94 : 2,790.18 = 561.42 : x
2. Step 2: Convert to fraction form
   1,859.94/2,790.18 = 561.42/x
3. Step 3: Cross multiply
   1,859.94x = 2,790.18 × 561.42
4. Step 4: Simplify right side
   1,859.94x = 1,566,462.86
5. Step 5: Solve for x
   x = 1,566,462.86/1,859.94
6. Step 6: Final answer
   x = 842.21