Finding the Fourth Proportional to 2,420.02, 3,628.41 and 1,120.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.02 : 3,628.41 = 1,120.78 : x
2. Step 2: Convert to fraction form
   2,420.02/3,628.41 = 1,120.78/x
3. Step 3: Cross multiply
   2,420.02x = 3,628.41 × 1,120.78
4. Step 4: Simplify right side
   2,420.02x = 4,066,649.36
5. Step 5: Solve for x
   x = 4,066,649.36/2,420.02
6. Step 6: Final answer
   x = 1,680.42