Finding the Fourth Proportional to 2,188.77, 3,021.35 and 1,603.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.77 : 3,021.35 = 1,603.95 : x
2. Step 2: Convert to fraction form
   2,188.77/3,021.35 = 1,603.95/x
3. Step 3: Cross multiply
   2,188.77x = 3,021.35 × 1,603.95
4. Step 4: Simplify right side
   2,188.77x = 4,846,086.31
5. Step 5: Solve for x
   x = 4,846,086.31/2,188.77
6. Step 6: Final answer
   x = 2,214.07