Finding the Fourth Proportional to 2,603.47, 3,906.83 and 873.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.47 : 3,906.83 = 873.31 : x
2. Step 2: Convert to fraction form
   2,603.47/3,906.83 = 873.31/x
3. Step 3: Cross multiply
   2,603.47x = 3,906.83 × 873.31
4. Step 4: Simplify right side
   2,603.47x = 3,411,869.34
5. Step 5: Solve for x
   x = 3,411,869.34/2,603.47
6. Step 6: Final answer
   x = 1,310.51