Finding the Fourth Proportional to 3,426.45, 5,132.47 and 3,387.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.45 : 5,132.47 = 3,387.57 : x
2. Step 2: Convert to fraction form
   3,426.45/5,132.47 = 3,387.57/x
3. Step 3: Cross multiply
   3,426.45x = 5,132.47 × 3,387.57
4. Step 4: Simplify right side
   3,426.45x = 17,386,601.40
5. Step 5: Solve for x
   x = 17,386,601.40/3,426.45
6. Step 6: Final answer
   x = 5,074.23