Finding the Fourth Proportional to 1,978.68, 2,969.10 and 883.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.68 : 2,969.10 = 883.80 : x
2. Step 2: Convert to fraction form
   1,978.68/2,969.10 = 883.80/x
3. Step 3: Cross multiply
   1,978.68x = 2,969.10 × 883.80
4. Step 4: Simplify right side
   1,978.68x = 2,624,090.58
5. Step 5: Solve for x
   x = 2,624,090.58/1,978.68
6. Step 6: Final answer
   x = 1,326.18