Finding the Fourth Proportional to 2,453.67, 3,385.89 and 1,391.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.67 : 3,385.89 = 1,391.46 : x
2. Step 2: Convert to fraction form
   2,453.67/3,385.89 = 1,391.46/x
3. Step 3: Cross multiply
   2,453.67x = 3,385.89 × 1,391.46
4. Step 4: Simplify right side
   2,453.67x = 4,711,330.50
5. Step 5: Solve for x
   x = 4,711,330.50/2,453.67
6. Step 6: Final answer
   x = 1,920.12