Finding the Fourth Proportional to 1,970.05, 2,718.55 and 1,085.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.05 : 2,718.55 = 1,085.86 : x
2. Step 2: Convert to fraction form
   1,970.05/2,718.55 = 1,085.86/x
3. Step 3: Cross multiply
   1,970.05x = 2,718.55 × 1,085.86
4. Step 4: Simplify right side
   1,970.05x = 2,951,952.48
5. Step 5: Solve for x
   x = 2,951,952.48/1,970.05
6. Step 6: Final answer
   x = 1,498.42