Finding the Fourth Proportional to 2,172.30, 3,258.93 and 671.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.30 : 3,258.93 = 671.32 : x
2. Step 2: Convert to fraction form
   2,172.30/3,258.93 = 671.32/x
3. Step 3: Cross multiply
   2,172.30x = 3,258.93 × 671.32
4. Step 4: Simplify right side
   2,172.30x = 2,187,784.89
5. Step 5: Solve for x
   x = 2,187,784.89/2,172.30
6. Step 6: Final answer
   x = 1,007.13