Finding the Fourth Proportional to 3,603.12, 4,972.76 and 2,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.12 : 4,972.76 = 2,111.61 : x
2. Step 2: Convert to fraction form
   3,603.12/4,972.76 = 2,111.61/x
3. Step 3: Cross multiply
   3,603.12x = 4,972.76 × 2,111.61
4. Step 4: Simplify right side
   3,603.12x = 10,500,535.02
5. Step 5: Solve for x
   x = 10,500,535.02/3,603.12
6. Step 6: Final answer
   x = 2,914.29