Finding the Fourth Proportional to 2,405.72, 3,320.42 and 1,522.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.72 : 3,320.42 = 1,522.70 : x
2. Step 2: Convert to fraction form
   2,405.72/3,320.42 = 1,522.70/x
3. Step 3: Cross multiply
   2,405.72x = 3,320.42 × 1,522.70
4. Step 4: Simplify right side
   2,405.72x = 5,056,003.53
5. Step 5: Solve for x
   x = 5,056,003.53/2,405.72
6. Step 6: Final answer
   x = 2,101.66