Finding the Fourth Proportional to 1,978.02, 2,966.52 and 881.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.02 : 2,966.52 = 881.76 : x
2. Step 2: Convert to fraction form
   1,978.02/2,966.52 = 881.76/x
3. Step 3: Cross multiply
   1,978.02x = 2,966.52 × 881.76
4. Step 4: Simplify right side
   1,978.02x = 2,615,758.68
5. Step 5: Solve for x
   x = 2,615,758.68/1,978.02
6. Step 6: Final answer
   x = 1,322.41