Finding the Fourth Proportional to 2,981.42, 4,111.50 and 1,918.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.42 : 4,111.50 = 1,918.10 : x
2. Step 2: Convert to fraction form
   2,981.42/4,111.50 = 1,918.10/x
3. Step 3: Cross multiply
   2,981.42x = 4,111.50 × 1,918.10
4. Step 4: Simplify right side
   2,981.42x = 7,886,268.15
5. Step 5: Solve for x
   x = 7,886,268.15/2,981.42
6. Step 6: Final answer
   x = 2,645.14