Finding the Fourth Proportional to 1,978.53, 2,730.21 and 1,768.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.53 : 2,730.21 = 1,768.03 : x
2. Step 2: Convert to fraction form
   1,978.53/2,730.21 = 1,768.03/x
3. Step 3: Cross multiply
   1,978.53x = 2,730.21 × 1,768.03
4. Step 4: Simplify right side
   1,978.53x = 4,827,079.73
5. Step 5: Solve for x
   x = 4,827,079.73/1,978.53
6. Step 6: Final answer
   x = 2,439.73