Finding the Fourth Proportional to 2,298.54, 3,445.86 and 912.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.54 : 3,445.86 = 912.85 : x
2. Step 2: Convert to fraction form
   2,298.54/3,445.86 = 912.85/x
3. Step 3: Cross multiply
   2,298.54x = 3,445.86 × 912.85
4. Step 4: Simplify right side
   2,298.54x = 3,145,553.30
5. Step 5: Solve for x
   x = 3,145,553.30/2,298.54
6. Step 6: Final answer
   x = 1,368.50