Finding the Fourth Proportional to 1,978.74, 2,968.92 and 1,947.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.74 : 2,968.92 = 1,947.69 : x
2. Step 2: Convert to fraction form
   1,978.74/2,968.92 = 1,947.69/x
3. Step 3: Cross multiply
   1,978.74x = 2,968.92 × 1,947.69
4. Step 4: Simplify right side
   1,978.74x = 5,782,535.79
5. Step 5: Solve for x
   x = 5,782,535.79/1,978.74
6. Step 6: Final answer
   x = 2,922.33