Finding the Fourth Proportional to 3,469.88, 4,788.56 and 1,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,469.88 : 4,788.56 = 1,978.03 : x
2. Step 2: Convert to fraction form
   3,469.88/4,788.56 = 1,978.03/x
3. Step 3: Cross multiply
   3,469.88x = 4,788.56 × 1,978.03
4. Step 4: Simplify right side
   3,469.88x = 9,471,915.34
5. Step 5: Solve for x
   x = 9,471,915.34/3,469.88
6. Step 6: Final answer
   x = 2,729.75