Finding the Fourth Proportional to 1,034.72, 1,427.71 and 661.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.72 : 1,427.71 = 661.41 : x
2. Step 2: Convert to fraction form
   1,034.72/1,427.71 = 661.41/x
3. Step 3: Cross multiply
   1,034.72x = 1,427.71 × 661.41
4. Step 4: Simplify right side
   1,034.72x = 944,301.67
5. Step 5: Solve for x
   x = 944,301.67/1,034.72
6. Step 6: Final answer
   x = 912.62