Finding the Fourth Proportional to 1,983.42, 2,978.16 and 1,879.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.42 : 2,978.16 = 1,879.53 : x
2. Step 2: Convert to fraction form
   1,983.42/2,978.16 = 1,879.53/x
3. Step 3: Cross multiply
   1,983.42x = 2,978.16 × 1,879.53
4. Step 4: Simplify right side
   1,983.42x = 5,597,541.06
5. Step 5: Solve for x
   x = 5,597,541.06/1,983.42
6. Step 6: Final answer
   x = 2,822.17