Finding the Fourth Proportional to 2,405.98, 3,321.90 and 1,557.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.98 : 3,321.90 = 1,557.29 : x
2. Step 2: Convert to fraction form
   2,405.98/3,321.90 = 1,557.29/x
3. Step 3: Cross multiply
   2,405.98x = 3,321.90 × 1,557.29
4. Step 4: Simplify right side
   2,405.98x = 5,173,148.82
5. Step 5: Solve for x
   x = 5,173,148.82/2,405.98
6. Step 6: Final answer
   x = 2,150.12