Finding the Fourth Proportional to 1,043.56, 1,440.06 and 571.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.56 : 1,440.06 = 571.46 : x
2. Step 2: Convert to fraction form
   1,043.56/1,440.06 = 571.46/x
3. Step 3: Cross multiply
   1,043.56x = 1,440.06 × 571.46
4. Step 4: Simplify right side
   1,043.56x = 822,936.69
5. Step 5: Solve for x
   x = 822,936.69/1,043.56
6. Step 6: Final answer
   x = 788.59