Finding the Fourth Proportional to 1,478.76, 2,040.30 and 1,085.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.76 : 2,040.30 = 1,085.10 : x
2. Step 2: Convert to fraction form
   1,478.76/2,040.30 = 1,085.10/x
3. Step 3: Cross multiply
   1,478.76x = 2,040.30 × 1,085.10
4. Step 4: Simplify right side
   1,478.76x = 2,213,929.53
5. Step 5: Solve for x
   x = 2,213,929.53/1,478.76
6. Step 6: Final answer
   x = 1,497.15