Finding the Fourth Proportional to 2,189.47, 3,288.12 and 2,101.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.47 : 3,288.12 = 2,101.38 : x
2. Step 2: Convert to fraction form
   2,189.47/3,288.12 = 2,101.38/x
3. Step 3: Cross multiply
   2,189.47x = 3,288.12 × 2,101.38
4. Step 4: Simplify right side
   2,189.47x = 6,909,589.61
5. Step 5: Solve for x
   x = 6,909,589.61/2,189.47
6. Step 6: Final answer
   x = 3,155.83