Finding the Fourth Proportional to 3,945.72, 5,918.64 and 1,997.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.72 : 5,918.64 = 1,997.52 : x
2. Step 2: Convert to fraction form
   3,945.72/5,918.64 = 1,997.52/x
3. Step 3: Cross multiply
   3,945.72x = 5,918.64 × 1,997.52
4. Step 4: Simplify right side
   3,945.72x = 11,822,601.77
5. Step 5: Solve for x
   x = 11,822,601.77/3,945.72
6. Step 6: Final answer
   x = 2,996.31