Finding the Fourth Proportional to 3,419.52, 5,128.74 and 1,111.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.52 : 5,128.74 = 1,111.02 : x
2. Step 2: Convert to fraction form
   3,419.52/5,128.74 = 1,111.02/x
3. Step 3: Cross multiply
   3,419.52x = 5,128.74 × 1,111.02
4. Step 4: Simplify right side
   3,419.52x = 5,698,132.71
5. Step 5: Solve for x
   x = 5,698,132.71/3,419.52
6. Step 6: Final answer
   x = 1,666.35