Finding the Fourth Proportional to 1,645.40, 2,266.83 and 1,054.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.40 : 2,266.83 = 1,054.91 : x
2. Step 2: Convert to fraction form
   1,645.40/2,266.83 = 1,054.91/x
3. Step 3: Cross multiply
   1,645.40x = 2,266.83 × 1,054.91
4. Step 4: Simplify right side
   1,645.40x = 2,391,290.30
5. Step 5: Solve for x
   x = 2,391,290.30/1,645.40
6. Step 6: Final answer
   x = 1,453.32