Finding the Fourth Proportional to 1,043.71, 1,440.25 and 577.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.71 : 1,440.25 = 577.96 : x
2. Step 2: Convert to fraction form
   1,043.71/1,440.25 = 577.96/x
3. Step 3: Cross multiply
   1,043.71x = 1,440.25 × 577.96
4. Step 4: Simplify right side
   1,043.71x = 832,406.89
5. Step 5: Solve for x
   x = 832,406.89/1,043.71
6. Step 6: Final answer
   x = 797.55