Finding the Fourth Proportional to 1,970.16, 2,718.78 and 1,085.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.16 : 2,718.78 = 1,085.96 : x
2. Step 2: Convert to fraction form
   1,970.16/2,718.78 = 1,085.96/x
3. Step 3: Cross multiply
   1,970.16x = 2,718.78 × 1,085.96
4. Step 4: Simplify right side
   1,970.16x = 2,952,486.33
5. Step 5: Solve for x
   x = 2,952,486.33/1,970.16
6. Step 6: Final answer
   x = 1,498.60