Finding the Fourth Proportional to 2,085.76, 2,878.32 and 1,246.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.76 : 2,878.32 = 1,246.84 : x
2. Step 2: Convert to fraction form
   2,085.76/2,878.32 = 1,246.84/x
3. Step 3: Cross multiply
   2,085.76x = 2,878.32 × 1,246.84
4. Step 4: Simplify right side
   2,085.76x = 3,588,804.51
5. Step 5: Solve for x
   x = 3,588,804.51/2,085.76
6. Step 6: Final answer
   x = 1,720.62