Finding the Fourth Proportional to 3,419.78, 5,130.47 and 1,080.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.78 : 5,130.47 = 1,080.02 : x
2. Step 2: Convert to fraction form
   3,419.78/5,130.47 = 1,080.02/x
3. Step 3: Cross multiply
   3,419.78x = 5,130.47 × 1,080.02
4. Step 4: Simplify right side
   3,419.78x = 5,540,991.98
5. Step 5: Solve for x
   x = 5,540,991.98/3,419.78
6. Step 6: Final answer
   x = 1,620.28