Finding the Fourth Proportional to 1,561.44, 2,154.82 and 862.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.44 : 2,154.82 = 862.82 : x
2. Step 2: Convert to fraction form
   1,561.44/2,154.82 = 862.82/x
3. Step 3: Cross multiply
   1,561.44x = 2,154.82 × 862.82
4. Step 4: Simplify right side
   1,561.44x = 1,859,221.79
5. Step 5: Solve for x
   x = 1,859,221.79/1,561.44
6. Step 6: Final answer
   x = 1,190.71