Finding the Fourth Proportional to 1,366.83, 1,885.55 and 862.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.83 : 1,885.55 = 862.45 : x
2. Step 2: Convert to fraction form
   1,366.83/1,885.55 = 862.45/x
3. Step 3: Cross multiply
   1,366.83x = 1,885.55 × 862.45
4. Step 4: Simplify right side
   1,366.83x = 1,626,193.88
5. Step 5: Solve for x
   x = 1,626,193.88/1,366.83
6. Step 6: Final answer
   x = 1,189.76