Finding the Fourth Proportional to 2,420.16, 3,339.72 and 1,372.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.16 : 3,339.72 = 1,372.28 : x
2. Step 2: Convert to fraction form
   2,420.16/3,339.72 = 1,372.28/x
3. Step 3: Cross multiply
   2,420.16x = 3,339.72 × 1,372.28
4. Step 4: Simplify right side
   2,420.16x = 4,583,030.96
5. Step 5: Solve for x
   x = 4,583,030.96/2,420.16
6. Step 6: Final answer
   x = 1,893.69