Finding the Fourth Proportional to 1,435.26, 1,979.91 and 1,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.26 : 1,979.91 = 1,085.34 : x
2. Step 2: Convert to fraction form
   1,435.26/1,979.91 = 1,085.34/x
3. Step 3: Cross multiply
   1,435.26x = 1,979.91 × 1,085.34
4. Step 4: Simplify right side
   1,435.26x = 2,148,875.52
5. Step 5: Solve for x
   x = 2,148,875.52/1,435.26
6. Step 6: Final answer
   x = 1,497.20