Finding the Fourth Proportional to 2,892.78, 3,989.72 and 1,948.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,892.78 : 3,989.72 = 1,948.26 : x
2. Step 2: Convert to fraction form
   2,892.78/3,989.72 = 1,948.26/x
3. Step 3: Cross multiply
   2,892.78x = 3,989.72 × 1,948.26
4. Step 4: Simplify right side
   2,892.78x = 7,773,011.89
5. Step 5: Solve for x
   x = 7,773,011.89/2,892.78
6. Step 6: Final answer
   x = 2,687.04