Finding the Fourth Proportional to 2,355.89, 3,533.48 and 1,315.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,355.89 : 3,533.48 = 1,315.25 : x
2. Step 2: Convert to fraction form
   2,355.89/3,533.48 = 1,315.25/x
3. Step 3: Cross multiply
   2,355.89x = 3,533.48 × 1,315.25
4. Step 4: Simplify right side
   2,355.89x = 4,647,385.33
5. Step 5: Solve for x
   x = 4,647,385.33/2,355.89
6. Step 6: Final answer
   x = 1,972.67