Finding the Fourth Proportional to 1,042.82, 1,439.06 and 577.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.82 : 1,439.06 = 577.07 : x
2. Step 2: Convert to fraction form
   1,042.82/1,439.06 = 577.07/x
3. Step 3: Cross multiply
   1,042.82x = 1,439.06 × 577.07
4. Step 4: Simplify right side
   1,042.82x = 830,428.27
5. Step 5: Solve for x
   x = 830,428.27/1,042.82
6. Step 6: Final answer
   x = 796.33