Finding the Fourth Proportional to 2,345.05, 3,516.85 and 1,112.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345.05 : 3,516.85 = 1,112.10 : x
2. Step 2: Convert to fraction form
   2,345.05/3,516.85 = 1,112.10/x
3. Step 3: Cross multiply
   2,345.05x = 3,516.85 × 1,112.10
4. Step 4: Simplify right side
   2,345.05x = 3,911,088.89
5. Step 5: Solve for x
   x = 3,911,088.89/2,345.05
6. Step 6: Final answer
   x = 1,667.81