Finding the Fourth Proportional to 2,085.63, 2,878.57 and 1,246.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.63 : 2,878.57 = 1,246.47 : x
2. Step 2: Convert to fraction form
   2,085.63/2,878.57 = 1,246.47/x
3. Step 3: Cross multiply
   2,085.63x = 2,878.57 × 1,246.47
4. Step 4: Simplify right side
   2,085.63x = 3,588,051.15
5. Step 5: Solve for x
   x = 3,588,051.15/2,085.63
6. Step 6: Final answer
   x = 1,720.37