Finding the Fourth Proportional to 1,076.22, 1,484.55 and 661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.22 : 1,484.55 = 661.50 : x
2. Step 2: Convert to fraction form
   1,076.22/1,484.55 = 661.50/x
3. Step 3: Cross multiply
   1,076.22x = 1,484.55 × 661.50
4. Step 4: Simplify right side
   1,076.22x = 982,029.83
5. Step 5: Solve for x
   x = 982,029.83/1,076.22
6. Step 6: Final answer
   x = 912.48