Finding the Fourth Proportional to 2,018.29, 3,025.89 and 921.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.29 : 3,025.89 = 921.88 : x
2. Step 2: Convert to fraction form
   2,018.29/3,025.89 = 921.88/x
3. Step 3: Cross multiply
   2,018.29x = 3,025.89 × 921.88
4. Step 4: Simplify right side
   2,018.29x = 2,789,507.47
5. Step 5: Solve for x
   x = 2,789,507.47/2,018.29
6. Step 6: Final answer
   x = 1,382.11