Finding the Fourth Proportional to 1,945.42, 2,916.40 and 712.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.42 : 2,916.40 = 712.54 : x
2. Step 2: Convert to fraction form
   1,945.42/2,916.40 = 712.54/x
3. Step 3: Cross multiply
   1,945.42x = 2,916.40 × 712.54
4. Step 4: Simplify right side
   1,945.42x = 2,078,061.33
5. Step 5: Solve for x
   x = 2,078,061.33/1,945.42
6. Step 6: Final answer
   x = 1,068.18