Finding the Fourth Proportional to 2,085.41, 3,128.98 and 914.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.41 : 3,128.98 = 914.80 : x
2. Step 2: Convert to fraction form
   2,085.41/3,128.98 = 914.80/x
3. Step 3: Cross multiply
   2,085.41x = 3,128.98 × 914.80
4. Step 4: Simplify right side
   2,085.41x = 2,862,400.11
5. Step 5: Solve for x
   x = 2,862,400.11/2,085.41
6. Step 6: Final answer
   x = 1,372.59