Finding the Fourth Proportional to 3,453.75, 5,181.45 and 1,145.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,453.75 : 5,181.45 = 1,145.25 : x
2. Step 2: Convert to fraction form
   3,453.75/5,181.45 = 1,145.25/x
3. Step 3: Cross multiply
   3,453.75x = 5,181.45 × 1,145.25
4. Step 4: Simplify right side
   3,453.75x = 5,934,055.61
5. Step 5: Solve for x
   x = 5,934,055.61/3,453.75
6. Step 6: Final answer
   x = 1,718.15