Finding the Fourth Proportional to 2,073.93, 3,111.81 and 687.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.93 : 3,111.81 = 687.47 : x
2. Step 2: Convert to fraction form
   2,073.93/3,111.81 = 687.47/x
3. Step 3: Cross multiply
   2,073.93x = 3,111.81 × 687.47
4. Step 4: Simplify right side
   2,073.93x = 2,139,276.02
5. Step 5: Solve for x
   x = 2,139,276.02/2,073.93
6. Step 6: Final answer
   x = 1,031.51