Finding the Fourth Proportional to 1,022.21, 1,530.27 and 655.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022.21 : 1,530.27 = 655.89 : x
2. Step 2: Convert to fraction form
   1,022.21/1,530.27 = 655.89/x
3. Step 3: Cross multiply
   1,022.21x = 1,530.27 × 655.89
4. Step 4: Simplify right side
   1,022.21x = 1,003,688.79
5. Step 5: Solve for x
   x = 1,003,688.79/1,022.21
6. Step 6: Final answer
   x = 981.88