Finding the Fourth Proportional to 1,076.56, 1,486.53 and 877.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.56 : 1,486.53 = 877.42 : x
2. Step 2: Convert to fraction form
   1,076.56/1,486.53 = 877.42/x
3. Step 3: Cross multiply
   1,076.56x = 1,486.53 × 877.42
4. Step 4: Simplify right side
   1,076.56x = 1,304,306.77
5. Step 5: Solve for x
   x = 1,304,306.77/1,076.56
6. Step 6: Final answer
   x = 1,211.55