Finding the Fourth Proportional to 1,881.31, 2,821.61 and 711.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,881.31 : 2,821.61 = 711.42 : x
2. Step 2: Convert to fraction form
   1,881.31/2,821.61 = 711.42/x
3. Step 3: Cross multiply
   1,881.31x = 2,821.61 × 711.42
4. Step 4: Simplify right side
   1,881.31x = 2,007,349.79
5. Step 5: Solve for x
   x = 2,007,349.79/1,881.31
6. Step 6: Final answer
   x = 1,067.00