Finding the Fourth Proportional to 1,970.18, 2,718.72 and 1,085.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.18 : 2,718.72 = 1,085.99 : x
2. Step 2: Convert to fraction form
   1,970.18/2,718.72 = 1,085.99/x
3. Step 3: Cross multiply
   1,970.18x = 2,718.72 × 1,085.99
4. Step 4: Simplify right side
   1,970.18x = 2,952,486.42
5. Step 5: Solve for x
   x = 2,952,486.42/1,970.18
6. Step 6: Final answer
   x = 1,498.59