Finding the Fourth Proportional to 1,978.86, 2,966.13 and 881.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.86 : 2,966.13 = 881.73 : x
2. Step 2: Convert to fraction form
   1,978.86/2,966.13 = 881.73/x
3. Step 3: Cross multiply
   1,978.86x = 2,966.13 × 881.73
4. Step 4: Simplify right side
   1,978.86x = 2,615,325.80
5. Step 5: Solve for x
   x = 2,615,325.80/1,978.86
6. Step 6: Final answer
   x = 1,321.63