Finding the Fourth Proportional to 2,617.40, 3,611.28 and 1,622.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.40 : 3,611.28 = 1,622.72 : x
2. Step 2: Convert to fraction form
   2,617.40/3,611.28 = 1,622.72/x
3. Step 3: Cross multiply
   2,617.40x = 3,611.28 × 1,622.72
4. Step 4: Simplify right side
   2,617.40x = 5,860,096.28
5. Step 5: Solve for x
   x = 5,860,096.28/2,617.40
6. Step 6: Final answer
   x = 2,238.90