Finding the Fourth Proportional to 3,419.52, 5,131.20 and 1,688.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.52 : 5,131.20 = 1,688.16 : x
2. Step 2: Convert to fraction form
   3,419.52/5,131.20 = 1,688.16/x
3. Step 3: Cross multiply
   3,419.52x = 5,131.20 × 1,688.16
4. Step 4: Simplify right side
   3,419.52x = 8,662,286.59
5. Step 5: Solve for x
   x = 8,662,286.59/3,419.52
6. Step 6: Final answer
   x = 2,533.19