Finding the Fourth Proportional to 1,645.34, 2,269.03 and 1,056.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.34 : 2,269.03 = 1,056.06 : x
2. Step 2: Convert to fraction form
   1,645.34/2,269.03 = 1,056.06/x
3. Step 3: Cross multiply
   1,645.34x = 2,269.03 × 1,056.06
4. Step 4: Simplify right side
   1,645.34x = 2,396,231.82
5. Step 5: Solve for x
   x = 2,396,231.82/1,645.34
6. Step 6: Final answer
   x = 1,456.37