Finding the Fourth Proportional to 2,352.34, 3,246.27 and 1,290.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,352.34 : 3,246.27 = 1,290.21 : x
2. Step 2: Convert to fraction form
   2,352.34/3,246.27 = 1,290.21/x
3. Step 3: Cross multiply
   2,352.34x = 3,246.27 × 1,290.21
4. Step 4: Simplify right side
   2,352.34x = 4,188,347.33
5. Step 5: Solve for x
   x = 4,188,347.33/2,352.34
6. Step 6: Final answer
   x = 1,780.50