Finding the Fourth Proportional to 1,040.32, 1,559.64 and 654.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.32 : 1,559.64 = 654.76 : x
2. Step 2: Convert to fraction form
   1,040.32/1,559.64 = 654.76/x
3. Step 3: Cross multiply
   1,040.32x = 1,559.64 × 654.76
4. Step 4: Simplify right side
   1,040.32x = 1,021,189.89
5. Step 5: Solve for x
   x = 1,021,189.89/1,040.32
6. Step 6: Final answer
   x = 981.61