Finding the Fourth Proportional to 1,488.83, 2,053.17 and 891.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.83 : 2,053.17 = 891.23 : x
2. Step 2: Convert to fraction form
   1,488.83/2,053.17 = 891.23/x
3. Step 3: Cross multiply
   1,488.83x = 2,053.17 × 891.23
4. Step 4: Simplify right side
   1,488.83x = 1,829,846.70
5. Step 5: Solve for x
   x = 1,829,846.70/1,488.83
6. Step 6: Final answer
   x = 1,229.05