Finding the Fourth Proportional to 787.88, 1,086.72 and 538.82

Step by Step Solution

1. Step 1: Write the proportion equation
   787.88 : 1,086.72 = 538.82 : x
2. Step 2: Convert to fraction form
   787.88/1,086.72 = 538.82/x
3. Step 3: Cross multiply
   787.88x = 1,086.72 × 538.82
4. Step 4: Simplify right side
   787.88x = 585,546.47
5. Step 5: Solve for x
   x = 585,546.47/787.88
6. Step 6: Final answer
   x = 743.19