Finding the Fourth Proportional to 2,892.78, 3,991.86 and 1,773.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,892.78 : 3,991.86 = 1,773.72 : x
2. Step 2: Convert to fraction form
   2,892.78/3,991.86 = 1,773.72/x
3. Step 3: Cross multiply
   2,892.78x = 3,991.86 × 1,773.72
4. Step 4: Simplify right side
   2,892.78x = 7,080,441.92
5. Step 5: Solve for x
   x = 7,080,441.92/2,892.78
6. Step 6: Final answer
   x = 2,447.63