Finding the Fourth Proportional to 2,084.80, 3,131.14 and 1,264.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.80 : 3,131.14 = 1,264.56 : x
2. Step 2: Convert to fraction form
   2,084.80/3,131.14 = 1,264.56/x
3. Step 3: Cross multiply
   2,084.80x = 3,131.14 × 1,264.56
4. Step 4: Simplify right side
   2,084.80x = 3,959,514.40
5. Step 5: Solve for x
   x = 3,959,514.40/2,084.80
6. Step 6: Final answer
   x = 1,899.23