Finding the Fourth Proportional to 2,345.02, 3,516.50 and 1,112.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345.02 : 3,516.50 = 1,112.78 : x
2. Step 2: Convert to fraction form
   2,345.02/3,516.50 = 1,112.78/x
3. Step 3: Cross multiply
   2,345.02x = 3,516.50 × 1,112.78
4. Step 4: Simplify right side
   2,345.02x = 3,913,090.87
5. Step 5: Solve for x
   x = 3,913,090.87/2,345.02
6. Step 6: Final answer
   x = 1,668.68