Finding the Fourth Proportional to 1,970.03, 2,718.72 and 1,085.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.03 : 2,718.72 = 1,085.90 : x
2. Step 2: Convert to fraction form
   1,970.03/2,718.72 = 1,085.90/x
3. Step 3: Cross multiply
   1,970.03x = 2,718.72 × 1,085.90
4. Step 4: Simplify right side
   1,970.03x = 2,952,258.05
5. Step 5: Solve for x
   x = 2,952,258.05/1,970.03
6. Step 6: Final answer
   x = 1,498.59