Finding the Fourth Proportional to 2,112.98, 3,167.73 and 881.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.98 : 3,167.73 = 881.30 : x
2. Step 2: Convert to fraction form
   2,112.98/3,167.73 = 881.30/x
3. Step 3: Cross multiply
   2,112.98x = 3,167.73 × 881.30
4. Step 4: Simplify right side
   2,112.98x = 2,791,704.61
5. Step 5: Solve for x
   x = 2,791,704.61/2,112.98
6. Step 6: Final answer
   x = 1,321.22