Finding the Fourth Proportional to 2,352.50, 3,246.27 and 1,290.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,352.50 : 3,246.27 = 1,290.09 : x
2. Step 2: Convert to fraction form
   2,352.50/3,246.27 = 1,290.09/x
3. Step 3: Cross multiply
   2,352.50x = 3,246.27 × 1,290.09
4. Step 4: Simplify right side
   2,352.50x = 4,187,980.46
5. Step 5: Solve for x
   x = 4,187,980.46/2,352.50
6. Step 6: Final answer
   x = 1,780.23