Finding the Fourth Proportional to 1,446.36, 1,998.15 and 1,005.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.36 : 1,998.15 = 1,005.78 : x
2. Step 2: Convert to fraction form
   1,446.36/1,998.15 = 1,005.78/x
3. Step 3: Cross multiply
   1,446.36x = 1,998.15 × 1,005.78
4. Step 4: Simplify right side
   1,446.36x = 2,009,699.31
5. Step 5: Solve for x
   x = 2,009,699.31/1,446.36
6. Step 6: Final answer
   x = 1,389.49