Finding the Fourth Proportional to 1,978.02, 2,966.64 and 881.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.02 : 2,966.64 = 881.82 : x
2. Step 2: Convert to fraction form
   1,978.02/2,966.64 = 881.82/x
3. Step 3: Cross multiply
   1,978.02x = 2,966.64 × 881.82
4. Step 4: Simplify right side
   1,978.02x = 2,616,042.48
5. Step 5: Solve for x
   x = 2,616,042.48/1,978.02
6. Step 6: Final answer
   x = 1,322.56