Finding the Fourth Proportional to 3,429.18, 5,145.48 and 1,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.18 : 5,145.48 = 1,786.50 : x
2. Step 2: Convert to fraction form
   3,429.18/5,145.48 = 1,786.50/x
3. Step 3: Cross multiply
   3,429.18x = 5,145.48 × 1,786.50
4. Step 4: Simplify right side
   3,429.18x = 9,192,400.02
5. Step 5: Solve for x
   x = 9,192,400.02/3,429.18
6. Step 6: Final answer
   x = 2,680.64