Finding the Fourth Proportional to 3,405.48, 5,105.51 and 3,132.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.48 : 5,105.51 = 3,132.12 : x
2. Step 2: Convert to fraction form
   3,405.48/5,105.51 = 3,132.12/x
3. Step 3: Cross multiply
   3,405.48x = 5,105.51 × 3,132.12
4. Step 4: Simplify right side
   3,405.48x = 15,991,054.32
5. Step 5: Solve for x
   x = 15,991,054.32/3,405.48
6. Step 6: Final answer
   x = 4,695.68