Finding the Fourth Proportional to 1,521.32, 2,280.56 and 826.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.32 : 2,280.56 = 826.96 : x
2. Step 2: Convert to fraction form
   1,521.32/2,280.56 = 826.96/x
3. Step 3: Cross multiply
   1,521.32x = 2,280.56 × 826.96
4. Step 4: Simplify right side
   1,521.32x = 1,885,931.90
5. Step 5: Solve for x
   x = 1,885,931.90/1,521.32
6. Step 6: Final answer
   x = 1,239.67