Finding the Fourth Proportional to 1,042.34, 1,438.43 and 576.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.34 : 1,438.43 = 576.59 : x
2. Step 2: Convert to fraction form
   1,042.34/1,438.43 = 576.59/x
3. Step 3: Cross multiply
   1,042.34x = 1,438.43 × 576.59
4. Step 4: Simplify right side
   1,042.34x = 829,374.28
5. Step 5: Solve for x
   x = 829,374.28/1,042.34
6. Step 6: Final answer
   x = 795.69