Finding the Fourth Proportional to 1,521.51, 2,099.69 and 822.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.51 : 2,099.69 = 822.89 : x
2. Step 2: Convert to fraction form
   1,521.51/2,099.69 = 822.89/x
3. Step 3: Cross multiply
   1,521.51x = 2,099.69 × 822.89
4. Step 4: Simplify right side
   1,521.51x = 1,727,813.90
5. Step 5: Solve for x
   x = 1,727,813.90/1,521.51
6. Step 6: Final answer
   x = 1,135.59