Finding the Fourth Proportional to 3,603.21, 4,973.67 and 2,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.21 : 4,973.67 = 2,111.61 : x
2. Step 2: Convert to fraction form
   3,603.21/4,973.67 = 2,111.61/x
3. Step 3: Cross multiply
   3,603.21x = 4,973.67 × 2,111.61
4. Step 4: Simplify right side
   3,603.21x = 10,502,451.31
5. Step 5: Solve for x
   x = 10,502,451.31/3,603.21
6. Step 6: Final answer
   x = 2,914.75