Finding the Fourth Proportional to 2,405.86, 3,321.07 and 1,521.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.86 : 3,321.07 = 1,521.52 : x
2. Step 2: Convert to fraction form
   2,405.86/3,321.07 = 1,521.52/x
3. Step 3: Cross multiply
   2,405.86x = 3,321.07 × 1,521.52
4. Step 4: Simplify right side
   2,405.86x = 5,053,062.32
5. Step 5: Solve for x
   x = 5,053,062.32/2,405.86
6. Step 6: Final answer
   x = 2,100.32