Finding the Fourth Proportional to 1,078.32, 1,478.38 and 1,058.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.32 : 1,478.38 = 1,058.88 : x
2. Step 2: Convert to fraction form
   1,078.32/1,478.38 = 1,058.88/x
3. Step 3: Cross multiply
   1,078.32x = 1,478.38 × 1,058.88
4. Step 4: Simplify right side
   1,078.32x = 1,565,427.01
5. Step 5: Solve for x
   x = 1,565,427.01/1,078.32
6. Step 6: Final answer
   x = 1,451.73