Finding the Fourth Proportional to 4,705.20, 7,056.72 and 1,418.28

Step by Step Solution

1. Step 1: Write the proportion equation
   4,705.20 : 7,056.72 = 1,418.28 : x
2. Step 2: Convert to fraction form
   4,705.20/7,056.72 = 1,418.28/x
3. Step 3: Cross multiply
   4,705.20x = 7,056.72 × 1,418.28
4. Step 4: Simplify right side
   4,705.20x = 10,008,404.84
5. Step 5: Solve for x
   x = 10,008,404.84/4,705.20
6. Step 6: Final answer
   x = 2,127.09