Finding the Fourth Proportional to 1,086.67, 1,499.87 and 714.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.67 : 1,499.87 = 714.15 : x
2. Step 2: Convert to fraction form
   1,086.67/1,499.87 = 714.15/x
3. Step 3: Cross multiply
   1,086.67x = 1,499.87 × 714.15
4. Step 4: Simplify right side
   1,086.67x = 1,071,130.38
5. Step 5: Solve for x
   x = 1,071,130.38/1,086.67
6. Step 6: Final answer
   x = 985.70