Finding the Fourth Proportional to 1,450.78, 1,999.88 and 890.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,450.78 : 1,999.88 = 890.82 : x
2. Step 2: Convert to fraction form
   1,450.78/1,999.88 = 890.82/x
3. Step 3: Cross multiply
   1,450.78x = 1,999.88 × 890.82
4. Step 4: Simplify right side
   1,450.78x = 1,781,533.10
5. Step 5: Solve for x
   x = 1,781,533.10/1,450.78
6. Step 6: Final answer
   x = 1,227.98