Finding the Fourth Proportional to 1,488.35, 2,053.57 and 891.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.35 : 2,053.57 = 891.04 : x
2. Step 2: Convert to fraction form
   1,488.35/2,053.57 = 891.04/x
3. Step 3: Cross multiply
   1,488.35x = 2,053.57 × 891.04
4. Step 4: Simplify right side
   1,488.35x = 1,829,813.01
5. Step 5: Solve for x
   x = 1,829,813.01/1,488.35
6. Step 6: Final answer
   x = 1,229.42