Finding the Fourth Proportional to 1,479.43, 2,041.70 and 890.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.43 : 2,041.70 = 890.15 : x
2. Step 2: Convert to fraction form
   1,479.43/2,041.70 = 890.15/x
3. Step 3: Cross multiply
   1,479.43x = 2,041.70 × 890.15
4. Step 4: Simplify right side
   1,479.43x = 1,817,419.91
5. Step 5: Solve for x
   x = 1,817,419.91/1,479.43
6. Step 6: Final answer
   x = 1,228.46