Finding the Fourth Proportional to 1,978.88, 2,731.04 and 1,193.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.88 : 2,731.04 = 1,193.12 : x
2. Step 2: Convert to fraction form
   1,978.88/2,731.04 = 1,193.12/x
3. Step 3: Cross multiply
   1,978.88x = 2,731.04 × 1,193.12
4. Step 4: Simplify right side
   1,978.88x = 3,258,458.44
5. Step 5: Solve for x
   x = 3,258,458.44/1,978.88
6. Step 6: Final answer
   x = 1,646.62