Finding the Fourth Proportional to 1,411.72, 1,948.36 and 822.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.72 : 1,948.36 = 822.28 : x
2. Step 2: Convert to fraction form
   1,411.72/1,948.36 = 822.28/x
3. Step 3: Cross multiply
   1,411.72x = 1,948.36 × 822.28
4. Step 4: Simplify right side
   1,411.72x = 1,602,097.46
5. Step 5: Solve for x
   x = 1,602,097.46/1,411.72
6. Step 6: Final answer
   x = 1,134.85