Finding the Fourth Proportional to 2,085.22, 2,877.65 and 1,153.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.22 : 2,877.65 = 1,153.72 : x
2. Step 2: Convert to fraction form
   2,085.22/2,877.65 = 1,153.72/x
3. Step 3: Cross multiply
   2,085.22x = 2,877.65 × 1,153.72
4. Step 4: Simplify right side
   2,085.22x = 3,320,002.36
5. Step 5: Solve for x
   x = 3,320,002.36/2,085.22
6. Step 6: Final answer
   x = 1,592.16