Finding the Fourth Proportional to 2,085.58, 2,877.57 and 1,299.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.58 : 2,877.57 = 1,299.07 : x
2. Step 2: Convert to fraction form
   2,085.58/2,877.57 = 1,299.07/x
3. Step 3: Cross multiply
   2,085.58x = 2,877.57 × 1,299.07
4. Step 4: Simplify right side
   2,085.58x = 3,738,164.86
5. Step 5: Solve for x
   x = 3,738,164.86/2,085.58
6. Step 6: Final answer
   x = 1,792.39