Finding the Fourth Proportional to 3,345.69, 5,019.15 and 1,124.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,345.69 : 5,019.15 = 1,124.30 : x
2. Step 2: Convert to fraction form
   3,345.69/5,019.15 = 1,124.30/x
3. Step 3: Cross multiply
   3,345.69x = 5,019.15 × 1,124.30
4. Step 4: Simplify right side
   3,345.69x = 5,643,030.35
5. Step 5: Solve for x
   x = 5,643,030.35/3,345.69
6. Step 6: Final answer
   x = 1,686.66