Finding the Fourth Proportional to 2,665.86, 3,997.26 and 1,021.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.86 : 3,997.26 = 1,021.74 : x
2. Step 2: Convert to fraction form
   2,665.86/3,997.26 = 1,021.74/x
3. Step 3: Cross multiply
   2,665.86x = 3,997.26 × 1,021.74
4. Step 4: Simplify right side
   2,665.86x = 4,084,160.43
5. Step 5: Solve for x
   x = 4,084,160.43/2,665.86
6. Step 6: Final answer
   x = 1,532.02