Finding the Fourth Proportional to 2,420.72, 3,626.72 and 1,379.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.72 : 3,626.72 = 1,379.60 : x
2. Step 2: Convert to fraction form
   2,420.72/3,626.72 = 1,379.60/x
3. Step 3: Cross multiply
   2,420.72x = 3,626.72 × 1,379.60
4. Step 4: Simplify right side
   2,420.72x = 5,003,422.91
5. Step 5: Solve for x
   x = 5,003,422.91/2,420.72
6. Step 6: Final answer
   x = 2,066.92