Finding the Fourth Proportional to 2,428.58, 3,351.71 and 1,420.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.58 : 3,351.71 = 1,420.67 : x
2. Step 2: Convert to fraction form
   2,428.58/3,351.71 = 1,420.67/x
3. Step 3: Cross multiply
   2,428.58x = 3,351.71 × 1,420.67
4. Step 4: Simplify right side
   2,428.58x = 4,761,685.78
5. Step 5: Solve for x
   x = 4,761,685.78/2,428.58
6. Step 6: Final answer
   x = 1,960.69