Finding the Fourth Proportional to 2,406.69, 3,321.20 and 1,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.69 : 3,321.20 = 1,358.78 : x
2. Step 2: Convert to fraction form
   2,406.69/3,321.20 = 1,358.78/x
3. Step 3: Cross multiply
   2,406.69x = 3,321.20 × 1,358.78
4. Step 4: Simplify right side
   2,406.69x = 4,512,766.93
5. Step 5: Solve for x
   x = 4,512,766.93/2,406.69
6. Step 6: Final answer
   x = 1,875.09