Finding the Fourth Proportional to 2,882.30, 3,978.15 and 1,887.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,882.30 : 3,978.15 = 1,887.21 : x
2. Step 2: Convert to fraction form
   2,882.30/3,978.15 = 1,887.21/x
3. Step 3: Cross multiply
   2,882.30x = 3,978.15 × 1,887.21
4. Step 4: Simplify right side
   2,882.30x = 7,507,597.38
5. Step 5: Solve for x
   x = 7,507,597.38/2,882.30
6. Step 6: Final answer
   x = 2,604.73