Finding the Fourth Proportional to 1,087.90, 1,500.82 and 714.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.90 : 1,500.82 = 714.78 : x
2. Step 2: Convert to fraction form
   1,087.90/1,500.82 = 714.78/x
3. Step 3: Cross multiply
   1,087.90x = 1,500.82 × 714.78
4. Step 4: Simplify right side
   1,087.90x = 1,072,756.12
5. Step 5: Solve for x
   x = 1,072,756.12/1,087.90
6. Step 6: Final answer
   x = 986.08