Finding the Fourth Proportional to 2,645.23, 3,967.72 and 1,084.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.23 : 3,967.72 = 1,084.72 : x
2. Step 2: Convert to fraction form
   2,645.23/3,967.72 = 1,084.72/x
3. Step 3: Cross multiply
   2,645.23x = 3,967.72 × 1,084.72
4. Step 4: Simplify right side
   2,645.23x = 4,303,865.24
5. Step 5: Solve for x
   x = 4,303,865.24/2,645.23
6. Step 6: Final answer
   x = 1,627.03