Finding the Fourth Proportional to 3,455.64, 5,150.12 and 3,450.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,455.64 : 5,150.12 = 3,450.15 : x
2. Step 2: Convert to fraction form
   3,455.64/5,150.12 = 3,450.15/x
3. Step 3: Cross multiply
   3,455.64x = 5,150.12 × 3,450.15
4. Step 4: Simplify right side
   3,455.64x = 17,768,686.52
5. Step 5: Solve for x
   x = 17,768,686.52/3,455.64
6. Step 6: Final answer
   x = 5,141.94