Finding the Fourth Proportional to 2,978.43, 4,113 and 1,918.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.43 : 4,113 = 1,918.04 : x
2. Step 2: Convert to fraction form
   2,978.43/4,113 = 1,918.04/x
3. Step 3: Cross multiply
   2,978.43x = 4,113 × 1,918.04
4. Step 4: Simplify right side
   2,978.43x = 7,888,877.96
5. Step 5: Solve for x
   x = 7,888,877.96/2,978.43
6. Step 6: Final answer
   x = 2,648.67