Finding the Fourth Proportional to 2,353.88, 3,248.31 and 1,291.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,353.88 : 3,248.31 = 1,291.67 : x
2. Step 2: Convert to fraction form
   2,353.88/3,248.31 = 1,291.67/x
3. Step 3: Cross multiply
   2,353.88x = 3,248.31 × 1,291.67
4. Step 4: Simplify right side
   2,353.88x = 4,195,728.34
5. Step 5: Solve for x
   x = 4,195,728.34/2,353.88
6. Step 6: Final answer
   x = 1,782.48