Finding the Fourth Proportional to 1,087.08, 1,499.76 and 714.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.08 : 1,499.76 = 714.28 : x
2. Step 2: Convert to fraction form
   1,087.08/1,499.76 = 714.28/x
3. Step 3: Cross multiply
   1,087.08x = 1,499.76 × 714.28
4. Step 4: Simplify right side
   1,087.08x = 1,071,248.57
5. Step 5: Solve for x
   x = 1,071,248.57/1,087.08
6. Step 6: Final answer
   x = 985.44