Finding the Fourth Proportional to 2,551.50, 3,521.34 and 1,620

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.50 : 3,521.34 = 1,620 : x
2. Step 2: Convert to fraction form
   2,551.50/3,521.34 = 1,620/x
3. Step 3: Cross multiply
   2,551.50x = 3,521.34 × 1,620
4. Step 4: Simplify right side
   2,551.50x = 5,704,570.80
5. Step 5: Solve for x
   x = 5,704,570.80/2,551.50
6. Step 6: Final answer
   x = 2,235.77