Finding the Fourth Proportional to 2,981.35, 4,112.42 and 1,918.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.35 : 4,112.42 = 1,918.77 : x
2. Step 2: Convert to fraction form
   2,981.35/4,112.42 = 1,918.77/x
3. Step 3: Cross multiply
   2,981.35x = 4,112.42 × 1,918.77
4. Step 4: Simplify right side
   2,981.35x = 7,890,788.12
5. Step 5: Solve for x
   x = 7,890,788.12/2,981.35
6. Step 6: Final answer
   x = 2,646.72