Finding the Fourth Proportional to 1,976.89, 2,965.47 and 678.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.89 : 2,965.47 = 678.01 : x
2. Step 2: Convert to fraction form
   1,976.89/2,965.47 = 678.01/x
3. Step 3: Cross multiply
   1,976.89x = 2,965.47 × 678.01
4. Step 4: Simplify right side
   1,976.89x = 2,010,600.10
5. Step 5: Solve for x
   x = 2,010,600.10/1,976.89
6. Step 6: Final answer
   x = 1,017.05