Finding the Fourth Proportional to 1,087.29, 1,500.30 and 821.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.29 : 1,500.30 = 821.88 : x
2. Step 2: Convert to fraction form
   1,087.29/1,500.30 = 821.88/x
3. Step 3: Cross multiply
   1,087.29x = 1,500.30 × 821.88
4. Step 4: Simplify right side
   1,087.29x = 1,233,066.56
5. Step 5: Solve for x
   x = 1,233,066.56/1,087.29
6. Step 6: Final answer
   x = 1,134.07