Finding the Fourth Proportional to 1,403.58, 2,103.21 and 889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.58 : 2,103.21 = 889.50 : x
2. Step 2: Convert to fraction form
   1,403.58/2,103.21 = 889.50/x
3. Step 3: Cross multiply
   1,403.58x = 2,103.21 × 889.50
4. Step 4: Simplify right side
   1,403.58x = 1,870,805.30
5. Step 5: Solve for x
   x = 1,870,805.30/1,403.58
6. Step 6: Final answer
   x = 1,332.88