Finding the Fourth Proportional to 1,087.50, 1,499.77 and 808.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.50 : 1,499.77 = 808.43 : x
2. Step 2: Convert to fraction form
   1,087.50/1,499.77 = 808.43/x
3. Step 3: Cross multiply
   1,087.50x = 1,499.77 × 808.43
4. Step 4: Simplify right side
   1,087.50x = 1,212,456.46
5. Step 5: Solve for x
   x = 1,212,456.46/1,087.50
6. Step 6: Final answer
   x = 1,114.90