Finding the Fourth Proportional to 1,395.30, 1,927.22 and 1,021.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.30 : 1,927.22 = 1,021.76 : x
2. Step 2: Convert to fraction form
   1,395.30/1,927.22 = 1,021.76/x
3. Step 3: Cross multiply
   1,395.30x = 1,927.22 × 1,021.76
4. Step 4: Simplify right side
   1,395.30x = 1,969,145.39
5. Step 5: Solve for x
   x = 1,969,145.39/1,395.30
6. Step 6: Final answer
   x = 1,411.27