Finding the Fourth Proportional to 1,918.17, 2,874.72 and 1,392.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.17 : 2,874.72 = 1,392.84 : x
2. Step 2: Convert to fraction form
   1,918.17/2,874.72 = 1,392.84/x
3. Step 3: Cross multiply
   1,918.17x = 2,874.72 × 1,392.84
4. Step 4: Simplify right side
   1,918.17x = 4,004,025.00
5. Step 5: Solve for x
   x = 4,004,025.00/1,918.17
6. Step 6: Final answer
   x = 2,087.42