Finding the Fourth Proportional to 3,603.68, 4,972.88 and 2,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.68 : 4,972.88 = 2,111.72 : x
2. Step 2: Convert to fraction form
   3,603.68/4,972.88 = 2,111.72/x
3. Step 3: Cross multiply
   3,603.68x = 4,972.88 × 2,111.72
4. Step 4: Simplify right side
   3,603.68x = 10,501,294.73
5. Step 5: Solve for x
   x = 10,501,294.73/3,603.68
6. Step 6: Final answer
   x = 2,914.05