Finding the Fourth Proportional to 3,603.65, 4,972.37 and 2,111.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.65 : 4,972.37 = 2,111.58 : x
2. Step 2: Convert to fraction form
   3,603.65/4,972.37 = 2,111.58/x
3. Step 3: Cross multiply
   3,603.65x = 4,972.37 × 2,111.58
4. Step 4: Simplify right side
   3,603.65x = 10,499,546.49
5. Step 5: Solve for x
   x = 10,499,546.49/3,603.65
6. Step 6: Final answer
   x = 2,913.59