Finding the Fourth Proportional to 2,015.69, 3,025.35 and 1,042.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.69 : 3,025.35 = 1,042.47 : x
2. Step 2: Convert to fraction form
   2,015.69/3,025.35 = 1,042.47/x
3. Step 3: Cross multiply
   2,015.69x = 3,025.35 × 1,042.47
4. Step 4: Simplify right side
   2,015.69x = 3,153,836.61
5. Step 5: Solve for x
   x = 3,153,836.61/2,015.69
6. Step 6: Final answer
   x = 1,564.65