Finding the Fourth Proportional to 1,610.27, 2,222.71 and 981.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.27 : 2,222.71 = 981.21 : x
2. Step 2: Convert to fraction form
   1,610.27/2,222.71 = 981.21/x
3. Step 3: Cross multiply
   1,610.27x = 2,222.71 × 981.21
4. Step 4: Simplify right side
   1,610.27x = 2,180,931.71
5. Step 5: Solve for x
   x = 2,180,931.71/1,610.27
6. Step 6: Final answer
   x = 1,354.39