Finding the Fourth Proportional to 2,085.90, 3,133.38 and 1,264.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.90 : 3,133.38 = 1,264.56 : x
2. Step 2: Convert to fraction form
   2,085.90/3,133.38 = 1,264.56/x
3. Step 3: Cross multiply
   2,085.90x = 3,133.38 × 1,264.56
4. Step 4: Simplify right side
   2,085.90x = 3,962,347.01
5. Step 5: Solve for x
   x = 3,962,347.01/2,085.90
6. Step 6: Final answer
   x = 1,899.59