Finding the Fourth Proportional to 2,064.90, 3,100.82 and 1,286.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.90 : 3,100.82 = 1,286.72 : x
2. Step 2: Convert to fraction form
   2,064.90/3,100.82 = 1,286.72/x
3. Step 3: Cross multiply
   2,064.90x = 3,100.82 × 1,286.72
4. Step 4: Simplify right side
   2,064.90x = 3,989,887.11
5. Step 5: Solve for x
   x = 3,989,887.11/2,064.90
6. Step 6: Final answer
   x = 1,932.24