Finding the Fourth Proportional to 1,433.46, 1,977.78 and 873.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.46 : 1,977.78 = 873.90 : x
2. Step 2: Convert to fraction form
   1,433.46/1,977.78 = 873.90/x
3. Step 3: Cross multiply
   1,433.46x = 1,977.78 × 873.90
4. Step 4: Simplify right side
   1,433.46x = 1,728,381.94
5. Step 5: Solve for x
   x = 1,728,381.94/1,433.46
6. Step 6: Final answer
   x = 1,205.74