Finding the Fourth Proportional to 1,238.89, 1,709.85 and 714.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.89 : 1,709.85 = 714.82 : x
2. Step 2: Convert to fraction form
   1,238.89/1,709.85 = 714.82/x
3. Step 3: Cross multiply
   1,238.89x = 1,709.85 × 714.82
4. Step 4: Simplify right side
   1,238.89x = 1,222,234.98
5. Step 5: Solve for x
   x = 1,222,234.98/1,238.89
6. Step 6: Final answer
   x = 986.56