Finding the Fourth Proportional to 1,945.31, 2,912.57 and 1,513.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.31 : 2,912.57 = 1,513.31 : x
2. Step 2: Convert to fraction form
   1,945.31/2,912.57 = 1,513.31/x
3. Step 3: Cross multiply
   1,945.31x = 2,912.57 × 1,513.31
4. Step 4: Simplify right side
   1,945.31x = 4,407,613.74
5. Step 5: Solve for x
   x = 4,407,613.74/1,945.31
6. Step 6: Final answer
   x = 2,265.76