Finding the Fourth Proportional to 2,180.50, 3,270.78 and 881.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.50 : 3,270.78 = 881.74 : x
2. Step 2: Convert to fraction form
   2,180.50/3,270.78 = 881.74/x
3. Step 3: Cross multiply
   2,180.50x = 3,270.78 × 881.74
4. Step 4: Simplify right side
   2,180.50x = 2,883,977.56
5. Step 5: Solve for x
   x = 2,883,977.56/2,180.50
6. Step 6: Final answer
   x = 1,322.62