Finding the Fourth Proportional to 2,076.13, 3,111.45 and 978.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.13 : 3,111.45 = 978.94 : x
2. Step 2: Convert to fraction form
   2,076.13/3,111.45 = 978.94/x
3. Step 3: Cross multiply
   2,076.13x = 3,111.45 × 978.94
4. Step 4: Simplify right side
   2,076.13x = 3,045,922.86
5. Step 5: Solve for x
   x = 3,045,922.86/2,076.13
6. Step 6: Final answer
   x = 1,467.12