Finding the Fourth Proportional to 3,603.59, 4,974.20 and 2,111.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.59 : 4,974.20 = 2,111.99 : x
2. Step 2: Convert to fraction form
   3,603.59/4,974.20 = 2,111.99/x
3. Step 3: Cross multiply
   3,603.59x = 4,974.20 × 2,111.99
4. Step 4: Simplify right side
   3,603.59x = 10,505,425.23
5. Step 5: Solve for x
   x = 10,505,425.23/3,603.59
6. Step 6: Final answer
   x = 2,915.27