Finding the Fourth Proportional to 1,321.34, 1,822.84 and 928.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.34 : 1,822.84 = 928.59 : x
2. Step 2: Convert to fraction form
   1,321.34/1,822.84 = 928.59/x
3. Step 3: Cross multiply
   1,321.34x = 1,822.84 × 928.59
4. Step 4: Simplify right side
   1,321.34x = 1,692,670.88
5. Step 5: Solve for x
   x = 1,692,670.88/1,321.34
6. Step 6: Final answer
   x = 1,281.03