Finding the Fourth Proportional to 2,073.57, 3,111.67 and 840.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.57 : 3,111.67 = 840.99 : x
2. Step 2: Convert to fraction form
   2,073.57/3,111.67 = 840.99/x
3. Step 3: Cross multiply
   2,073.57x = 3,111.67 × 840.99
4. Step 4: Simplify right side
   2,073.57x = 2,616,882.59
5. Step 5: Solve for x
   x = 2,616,882.59/2,073.57
6. Step 6: Final answer
   x = 1,262.02