Finding the Fourth Proportional to 2,085.41, 3,128.73 and 988.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.41 : 3,128.73 = 988.27 : x
2. Step 2: Convert to fraction form
   2,085.41/3,128.73 = 988.27/x
3. Step 3: Cross multiply
   2,085.41x = 3,128.73 × 988.27
4. Step 4: Simplify right side
   2,085.41x = 3,092,018.47
5. Step 5: Solve for x
   x = 3,092,018.47/2,085.41
6. Step 6: Final answer
   x = 1,482.69