Finding the Fourth Proportional to 1,085.32, 1,498.26 and 619.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.32 : 1,498.26 = 619.48 : x
2. Step 2: Convert to fraction form
   1,085.32/1,498.26 = 619.48/x
3. Step 3: Cross multiply
   1,085.32x = 1,498.26 × 619.48
4. Step 4: Simplify right side
   1,085.32x = 928,142.10
5. Step 5: Solve for x
   x = 928,142.10/1,085.32
6. Step 6: Final answer
   x = 855.18