Finding the Fourth Proportional to 2,887.86, 3,982.59 and 1,892.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,887.86 : 3,982.59 = 1,892.78 : x
2. Step 2: Convert to fraction form
   2,887.86/3,982.59 = 1,892.78/x
3. Step 3: Cross multiply
   2,887.86x = 3,982.59 × 1,892.78
4. Step 4: Simplify right side
   2,887.86x = 7,538,146.79
5. Step 5: Solve for x
   x = 7,538,146.79/2,887.86
6. Step 6: Final answer
   x = 2,610.29