Finding the Fourth Proportional to 1,479.20, 2,040.56 and 975.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.20 : 2,040.56 = 975.76 : x
2. Step 2: Convert to fraction form
   1,479.20/2,040.56 = 975.76/x
3. Step 3: Cross multiply
   1,479.20x = 2,040.56 × 975.76
4. Step 4: Simplify right side
   1,479.20x = 1,991,096.83
5. Step 5: Solve for x
   x = 1,991,096.83/1,479.20
6. Step 6: Final answer
   x = 1,346.06