Finding the Fourth Proportional to 2,345.15, 3,519.45 and 1,112.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345.15 : 3,519.45 = 1,112.56 : x
2. Step 2: Convert to fraction form
   2,345.15/3,519.45 = 1,112.56/x
3. Step 3: Cross multiply
   2,345.15x = 3,519.45 × 1,112.56
4. Step 4: Simplify right side
   2,345.15x = 3,915,590.49
5. Step 5: Solve for x
   x = 3,915,590.49/2,345.15
6. Step 6: Final answer
   x = 1,669.65