Finding the Fourth Proportional to 1,432.22, 1,976.28 and 842.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.22 : 1,976.28 = 842.54 : x
2. Step 2: Convert to fraction form
   1,432.22/1,976.28 = 842.54/x
3. Step 3: Cross multiply
   1,432.22x = 1,976.28 × 842.54
4. Step 4: Simplify right side
   1,432.22x = 1,665,094.95
5. Step 5: Solve for x
   x = 1,665,094.95/1,432.22
6. Step 6: Final answer
   x = 1,162.60