Finding the Fourth Proportional to 2,172.54, 3,260.03 and 2,154.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.54 : 3,260.03 = 2,154.91 : x
2. Step 2: Convert to fraction form
   2,172.54/3,260.03 = 2,154.91/x
3. Step 3: Cross multiply
   2,172.54x = 3,260.03 × 2,154.91
4. Step 4: Simplify right side
   2,172.54x = 7,025,071.25
5. Step 5: Solve for x
   x = 7,025,071.25/2,172.54
6. Step 6: Final answer
   x = 3,233.58