Finding the Fourth Proportional to 1,064.18, 1,467.71 and 842.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.18 : 1,467.71 = 842.78 : x
2. Step 2: Convert to fraction form
   1,064.18/1,467.71 = 842.78/x
3. Step 3: Cross multiply
   1,064.18x = 1,467.71 × 842.78
4. Step 4: Simplify right side
   1,064.18x = 1,236,956.63
5. Step 5: Solve for x
   x = 1,236,956.63/1,064.18
6. Step 6: Final answer
   x = 1,162.36