Finding the Fourth Proportional to 1,479.89, 2,042.46 and 890.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.89 : 2,042.46 = 890.34 : x
2. Step 2: Convert to fraction form
   1,479.89/2,042.46 = 890.34/x
3. Step 3: Cross multiply
   1,479.89x = 2,042.46 × 890.34
4. Step 4: Simplify right side
   1,479.89x = 1,818,483.84
5. Step 5: Solve for x
   x = 1,818,483.84/1,479.89
6. Step 6: Final answer
   x = 1,228.80