Finding the Fourth Proportional to 2,247.89, 3,097.16 and 1,678.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,247.89 : 3,097.16 = 1,678.31 : x
2. Step 2: Convert to fraction form
   2,247.89/3,097.16 = 1,678.31/x
3. Step 3: Cross multiply
   2,247.89x = 3,097.16 × 1,678.31
4. Step 4: Simplify right side
   2,247.89x = 5,197,994.60
5. Step 5: Solve for x
   x = 5,197,994.60/2,247.89
6. Step 6: Final answer
   x = 2,312.39