Finding the Fourth Proportional to 1,488.51, 2,053.81 and 890.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.51 : 2,053.81 = 890.92 : x
2. Step 2: Convert to fraction form
   1,488.51/2,053.81 = 890.92/x
3. Step 3: Cross multiply
   1,488.51x = 2,053.81 × 890.92
4. Step 4: Simplify right side
   1,488.51x = 1,829,780.41
5. Step 5: Solve for x
   x = 1,829,780.41/1,488.51
6. Step 6: Final answer
   x = 1,229.27