Finding the Fourth Proportional to 1,645.47, 2,267.91 and 1,329.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.47 : 2,267.91 = 1,329.57 : x
2. Step 2: Convert to fraction form
   1,645.47/2,267.91 = 1,329.57/x
3. Step 3: Cross multiply
   1,645.47x = 2,267.91 × 1,329.57
4. Step 4: Simplify right side
   1,645.47x = 3,015,345.10
5. Step 5: Solve for x
   x = 3,015,345.10/1,645.47
6. Step 6: Final answer
   x = 1,832.51