Finding the Fourth Proportional to 2,406.80, 3,319.60 and 1,521.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.80 : 3,319.60 = 1,521.74 : x
2. Step 2: Convert to fraction form
   2,406.80/3,319.60 = 1,521.74/x
3. Step 3: Cross multiply
   2,406.80x = 3,319.60 × 1,521.74
4. Step 4: Simplify right side
   2,406.80x = 5,051,572.60
5. Step 5: Solve for x
   x = 5,051,572.60/2,406.80
6. Step 6: Final answer
   x = 2,098.88