Finding the Fourth Proportional to 2,405.86, 3,320.02 and 1,357.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.86 : 3,320.02 = 1,357.91 : x
2. Step 2: Convert to fraction form
   2,405.86/3,320.02 = 1,357.91/x
3. Step 3: Cross multiply
   2,405.86x = 3,320.02 × 1,357.91
4. Step 4: Simplify right side
   2,405.86x = 4,508,284.96
5. Step 5: Solve for x
   x = 4,508,284.96/2,405.86
6. Step 6: Final answer
   x = 1,873.88